She's done nothing wrong, but you're making her feel like she has and that's unfair to her. She doesn't deserve to be treated that way, so if you really care about her you need to man the fuck up. Everyone has a past, everyone has to start somewhere. Making someone regret their life or feel ashamed about who they are is not the road to a long and healthy relationship. You need to love and respect her for who and everything she is. Anything less is less than she deserves from you. You're letting your insecurity turn into selfishness.
Anyway, those are the lessons I learned from pulling the exact same shit you're doing. I know exactly how you're feeling and it's a sting in your gut that you just can't get passed. But you will, you just have to think about what really matters here: that she used to like some douchebag a long time ago or that she's with you here and now. Your choice dude.
The only result of this current path is you driving her away and in a couple months making a girl-age thread about the one that got away.
Anyway, those are the lessons I learned from pulling the exact same shit you're doing. I know exactly how you're feeling and it's a sting in your gut that you just can't get passed. But you will, you just have to think about what really matters here: that she used to like some douchebag a long time ago or that she's with you here and now. Your choice dude.
The only result of this current path is you driving her away and in a couple months making a girl-age thread about the one that got away.