u/Mundane-Display-2234

So earlier today i was scrolling on TikTok and decided to see if my girlfriend posted anything new on her account and the first video was something along the lines of wanting to have sex and some person in the comments said something along the lines of ‘whatever you say mommy’ and it really pissed me off, so I decide to look at their account and it was a dude around our ages and I’m not gay but I would consider him pretty attractive and on the videos he had posted(he had two or three posted)I watched the videos and my girlfriend was the only one commenting on them and on one of the videos she posted a sticker and the’😝’ emoji and that post he had his shirt of showing off in the mirror and the other video was a selfie of him laying in bed and my girlfriend had also commented on that saying ‘Lm crack’(lemme crack)so I screenshot some of the comments from his videos and send them to her and she just starts getting super defensive and she’s said that he was gay and had a boyfriend so I DM’d him and he said that he wasn’t gay and had been straight his whole life and I haven’t responded to like a couple texts from her cause I need some time to think about what to do and she been texting ‘oh this is a toxic relationship because you aren’t responding’ but like i just need some time and I have very solid evidence to believe that you might be cheating on me and after I texted her she went and deleted those comments since she knew that I saw them. So like I really don’t know what to do, like do I believe her or break up and before you rush to say ‘oh don’t break up with her because you think she might be cheating, just believe her’ just understand that she is hard to believe sometimes because this is not our first time together and she was the one to end it last time and was the one that came back to me and on top of all of that she does things that I have explicitly told her I don’t like and she says she stops but she‘ll slip up sometimes and say that she did something that I don’t like. I’m really at a loss of what I should do right now.