AITA if i tell a guy her gf cheated on him?
Basically, I found a TikTok video from my ex's private account. It said something along the lines of, "Surround yourself with people who are like you," or "Surround yourself with people who have the same energy as you."
At the beginning of the video, it was a slideshow. The first picture was my ex with her friend, and the second picture was some chat from either one of them—I don't know which one—saying something like, "I love both of them, I love all of you, they're all so hot," or "Either I stay with both of them or I stay with neither of them," and things like that.
Why would that be wrong? Her friend has a boyfriend, and they've been together for nine months. And this wouldn't be the first time either. So, if you want to consider this as her trying to cheat on him, this girl has tried to cheat on her boyfriend quite a few times. And her boyfriend doesn't know any of this.
Why does she want to cheat on her boyfriend? Because before they started dating, they had already been together, and her boyfriend cheated on her. They broke up, got back together, and they're still together now.
Anyway, let's call this guy David. When I was dating my ex and I would hang out with her, her friend would also be there with David. He was always really nice to me, always treated me well, and would sometimes even give me an opening to flirt with my ex back when we weren't together yet. So I ended up getting along really well with this guy.
My question is—I mean, I have the information. I know that she cheated on her boyfriend. I have an acquaintance who's very close to her, and I found out because one of his friends is really close to this acquaintance. That's how I found out that she cheated on David.
So what should I do? Should I tell David about the video and tell him that she cheated on him, without getting any proof first, obviously?
Or should I tell him that he was cheated on and nothing else? Should I only show him the video and tell him she cheated on him without any proof? Or should I just do nothing and not show him anything?
That's why I'm writing this here, because I genuinely don't know what to do. I don't know what the right thing to do in this situation is.