I (21f) slept with two people after my boyfriend (23m) opened our relationship and now he wants to break up with me.
I am NOT OOP. OOP is u/unraveledwords
Originally posted to r/relationship_advice
I (21f) slept with two people after my boyfriend (23m) opened our relationship and now he wants to break up with me.
Trigger Warnings: >!accusations of infidelity, gaslighting!<
Original Post: May 12, 2026
Sorry for the long post, I feel as though this is a very nuanced and unusual situation and so I struggled to explain it briefly.
So my boyfriend and I have been together throughout our times at university, coming up on three years now. He is my first relationship and my first body whereas he has slept with a number of people before we got together. We have spoken before about wanting to have a future together and potentially kids once we both have a stable source of income. For the first time in years we are spending a few months apart as he has a graduate job and I don’t. I have been living in my family home and working in hospitality, so we haven’t seen each other in a few weeks.
Prior to this our relationship was a little strained due to academic stress and we were arguing for the first time ever. We also almost entirely stopped having sex for months and the relationship felt like it was getting dry. I have a higher sex drive than he does anyway and so it was mostly me who was finding this difficult. We spoke about it and he suggested we opened up our relationship and allowed each other to see other people until we could move back in together when I found a job in the same city as him. He even implied that the idea of a threesome/ watching me have sex with someone else would excite him. As much as this might seem strange to other people I was quite excited he suggested this as I have never really had the opportunity to explore my sexuality. I was experiencing some anxiety about the fact that I have only ever been in a committed relationship, and I was worried I would one day regret not exploring more when I was younger. Despite this I still love him a lot and know he is the one I eventually want to settle down with.
Since we opened our relationship about a month ago I have slept with two people, a girl and a boy. I met them both on dating apps, and I was very open about the fact I had a boyfriend, and I just wanted to explore. Both people were very accepting of this. I enjoyed the experiences a lot and I ended up spending a few nights with this girl in her apartment. It was mostly just because I find living at home very frustrating after having the freedom of living with my friends/ boyfriend throughout uni and my parents still treat me like a child. She and I only actually had sex a couple of times after drinking and mostly when we would hang out we would just play Minecraft or go to the pub. It was more like a friends with benefits situation. I was very open about the fact I was staying at her place with my boyfriend, and she was totally ok with the fact I had a boyfriend.
So anyway, my boyfriend has been planning to visit me this coming weekend, and I have been thinking about what he said that he would like to have a threesome. I asked this girl about it, and she said she would be down, so I brought it up to my boyfriend and his reaction totally shocked me. He went absolutely nuts after finding out I had had sex with this girl already and said he had no idea. He feels like he has been cheated on because I didn’t explicitly tell him that I had sex with this girl, only that I had been staying at her place occasionally. I was sidelined. I assumed that he had also been seeing other people as there have been a few nights where he has not replied to me in the evening or asked to call like he usually does. However he is saying that when he spoke about opening up our relationship he meant only for threesomes and not for us to explore on my own. This surprised me as I got a completely different impression from our initial conversation where we spoke about us both getting a chance to explore before we settled down and became adults. One of my friends from uni also sent me a screenshot of him on a dating app from a couple of weeks ago which I told her I was completely fine with as we were both using them. He says now he only had the app to look for a third, not for him to do his own thing.
Now he is saying that he isn’t sure if he can look past me ‘cheating on him’ and that he needs some time to think about whether or not he wants to be with me. I am completely devastated. I have deleted the apps from my phone and blocked the two people I slept with no explanation. Although I did want to explore I have always been certain that he is the man for me. We get on so well and he is dependable, caring, driven, everything I could ever want in a partner. My friends and family love him and we also share most of the same friends, so our lives are intertwined. We have even decided on our kids names and the street we want to live on one day. I have tried to explain to him that this was just a lack of communication and that I never wanted to hurt him. I have never even looked at another person until we agreed to open the relationship. But he is just saying this changes the way he thinks about me entirely. He has barely spoken to me since finding out and pretty much ignored my apologies.
How do I earn his trust back?
Relevant / Top Comments
Commenter 1: Classic. He wanted to open up the relationship because he thought he'd get to sleep with other people, now he's mad & trying to punish because you had success on the apps and he didn't.
You didn't misunderstand, he's lying because he played himself and wants to make it your fault. > > Commenter 2: For real. This happens so much, it is practically a cliche. The man wants to open the relationship to get some side action, inevitably it is way easier for the partnered woman to find others, and the man gets pissed off about her success and wants to shut things down. OP, this isn’t for you to fix. Your boyfriend needs to own his actions rather than punishing you for them. Until he does that, I wouldn’t be trying to beg for his forgiveness. His behavior is juvenile and a red flag. > > The only comment for you is don't block the people you slept with without communicating. That isn't cool. They deserve respect and you shouldn’t try an open relationship if you are going to treat others poorly. You can simply say that you are taking a step back to focus on your primary relationship, won't be reaching out again and prefer not to be contacted. But blocking without saying anything is not cool. >> >> OOP: After receiving a few comments saying to unblock the girl I definitely will be! She was really great and I think we could have a friendship if nothing else now. I just did it out of blind panic because I wanted to salvage my relationship
Commenter 3: I didn't quite understand your post... Does your boyfriend know you had sex with another guy (not a girl)? If so, that's probably the real reason for his anger.
But either way, it's his fault. He shouldn't have suggested an open relationship if it wasn't a sincere decision.
> OOP: He knows about both now as he began questioning me about it when I told him about the girl
Downvoted Commenter: In the eyes of most poly relationships you have cheated. You said you made the new people aware of your BF, but did he know you were actively going on dates and intending to sleep with people? Usually opening the relationship means having honest open communication about your actions and intentions with other partners, not the ins and outs of the activities just an understanding that somethings brewing. I don't think you guys have the right communication and maturity for an open relationship. In terms of earning his trust back, it will take a lot of time and effort but it's difficult for things to ever go back to how they were.
> OOP: I didn’t tell him at all about the guy until he asked, but I was under the impression that he knew I had slept with the girl. I guess it is poor communication on my behalf that he didn’t understand the nature of my relationship with her. The reason why I didn’t tell him details is because I personally wouldn’t be comfortable with knowing the ins and outs of what my boyfriend was doing with other people and I stupidly assumed he felt the same. I just assumed that he was, and assumed he knew I was as that was what we had both agreed to do
Commenter 4: You didn't misunderstand. He's lying.
Commenter 5: "How do I earn his trust back?" What are you talking about??? How did you lose his trust? You agreed on an open relationship. Dump this insecure hypocritical boy.
Editor's note: OOP updated onto the original post
Update: May 13, 2026 (same post, next day)
UPDATE: Thank you everyone for the helpful comments! I didn’t expect this post to get so much attention, and I don’t normally use Reddit so I’m not sure if this is the correct way to do an ‘update.’
So he finally called me after he finished work last night for us to ‘talk.’ I apologised again for the miscommunication and said that I didn’t feel we had a detailed enough conversation to establish boundaries and to define what an open relationship means to us. He agreed but didn’t apologise for his role in that. He then said that he was mostly hurt because I seemed to have developed an emotional connection with this girl which I can understand and I apologised for again. Then he asked me if I felt like I was happy in our relationship. And to my surprise I told him I wasn’t. He said he wasn’t either and so we decided to break up. I haven’t even had a text from him this morning and I haven’t tried to reach out either.
I do feel hurt and a bit lost but after the last few days of crashing out I also feel a huge sense of relief. As well as reading all the comments under this post I also spoke to a couple of my friends and came to the conclusion that if the two of us were truly happy together we wouldn’t have felt the need to open our relationship in the first place. I am going to give it some time to heal but now when I am ready I am free to be a young adult without the pressure of a big future looming over me. It has also opened up new job opportunities as I don’t just have to look in the same city as him so we could move in together.
I know a lot of people are calling him a piece of shit and a gaslighting liar, but I am still very fond of him and so I don’t really care at the moment to argue with him and question his side of the story; whether he changed the terms of our open relationship or did end up sleeping around and didn’t want me to know.
Maybe at some point I will bring him up on this, but I think the most important thing is for us to both try and move forwards.
As for the ‘Minecraft girl,’ I sent her a text saying I will give her a call at some point soon to explain and she said that was totally ok and to take my time! So hopefully I have at least made a friend and something good has come out of this.
Thank you once again everyone for the help and support xx
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