She (27F) and I (27M) met at a wedding a year ago. This has been by far the best relationship of my life, and she's been nothing short of an amazing girlfriend. In any other scenario, can truly see myself spending the rest of my life with this woman.

But early on in our dating, it turns out she hooked up with a stranger at a bar. This was after our 2nd date (we weren't officially exclusive until 5 dates in). Despite not being exclusive, it rubbed me the wrong way when she told me but I was able to mostly get over it. She said she was drunk, it was quick and meaningless, mostly to get over her ex. I respected her honesty about the whole thing. And I also didn't make my romantic intentions clear until the third date (my fault). So our relationship continued and we've been happy since, until around 2 weeks ago..

I got more details about the hookup. That she was the one who approached him, and brought him back to her place. They didn't even know each others names, they only talked for like 20 minutes before leaving. Also found out she was more tipsy than drunk and in full control of her actions. The guy was like a foot taller than me, jacked, everything I'm not. I got jealous she actively pursued this man, all while I was pursuing her. She gave him everything physical immediately, and made me wait 8 dates to get that far.

I've tried to get over this. I know a lot of the issues are my own insecurities. We've even discussed it multiple times. But I'm not sure what she can say to make it better.

We've been talking about commitment somewhat soon. I'm not sure I can give my entire future to someone who would do this to someone. It might be my ego talking, but I feel disrespected and like a second choice.

I know she has been faithful since we went exclusive. And since exclusivity, the sexual/physical attraction from her side has been very high. But I'm worried this action showed what she really wants, and that she's using me as a "stable" settle down type guy.

Walking away from this is one of the toughest things I've ever done. But hopefully I find someone who matches my values a bit more. Part of me is just worried I won't.