A long time ago I had this girlfriend that cheated on me. We'd been dating for almost a year til one day I sorta walked in on it, and it kinda broke my heart. I told her to go fuck herself and left it at that. A week later she came to me sobbing and telling me how much I meant to her and how sorry she was... shit like that. So I gave it another chance. Within a week or two we both realized shit couldn't go back to how it was before, and we split. Anyways... the point of all that... was that to this day I can't find an explanation for it that seems acceptible. For a while a thought that it was cuz she didnt' care at all about me. But she came back, and she didn't need to. So I dunno if thats it. For a while I thought it was cuz she was on drugz or something, but I've done drugs many many times and never had the urge to fuck around with other people. I've come up with a few other things too. But nothing ever seems to feel right, so now when I think of relationships, I always think back to that, and it scares me. If I don't know what caused it, I don't know how to prevent it from happening again, or better yet, avoid being with people with whom there is that possibility. I'm sure theres at least one person here thats cheated. And on the other side, I'm sure theres at least one person here who's been cheated on. So I'm wondering if maybe they can give me their perspective on why they would do it, or why it happened to them? I'd really like to know the mentality behind it, so I can move on from it.