<human>: Can you give me the gist of the text in a nutshell?

My current gf and I had been hooking up during the past two summers before we decided to date. During the year we would go back to school in separate cities. We would hook up when she came back for holidays however we were not exclusive. 

This past summer, we got closer. I made a trip to her city for a weekend a couple weeks after she left for school and asked her if she wanted to date. She was excited as she had never dated anyone before and I believe has low self esteem because of it. 

The next night after we began dating she asked (While drunk): "Why do you want to date me? I'm a slut". I believe this is because of her low self esteem, I didn't ask how many people she slept with because I don't want to know. At a concert we had sex in a washroom, I thought this was just a crazy fun thing to do. While driving back the next day, I said it was a first for me and she said she had done it once before.  I was a bit taken aback but avoided making it awkward. 

I have known her for 10 years however I don't know this part of her life. We have a very close friend group and I'm not at all worried about her cheating on me, she is very into me. I am just having a very hard time getting over the idea that she has had a lot of one night stands. I find solace in the fact she has never dated before, I think that's pretty special.
<bot>: GF has promiscuous past, having trouble coping. Its my issue and I have made no effort to make her feel bad about it.