<human>: Can you condense the text into a few key points?

I was a virgin until we got together late last year. I had pretty much given up on it altogether. We were out with a few of her friends last weekend when one of them mentioned something that caught my attention. What I should have done was just shake it off. What I ended up doing was digging until I got the story. I really wish I hadn't done that.

I got real quiet. She kept asking if I was okay, I kept saying I was, but I guess it was obvious from my face that I wasn't. I want to be. I like her a lot, we get along great, and it shouldn't matter because it's in the past. But I can't shake the image from my head. I think what makes it worse is that the guy who mentioned it was one of the ones involved.

So now I'm pretty much physically ill, my head is swimming, she knows what's wrong even without my saying it so she's upset as well. It's really throwing the whole relationship into turbulence, and for no good reason at all. Anyone else been through something similar? How did you get over it? Did you get over it at all?
<bot>: Girlfriend has a sexual past that I'm not really happy about. But I like her. How do I get over it?