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

My boyfriend lives in an apartment with a few roommates. We're both college students so we both have roommates. However, all my room mates are female and just friends. He lives with guys and girls, but one of the girls he's lived with he's been with when drunk. They never had sex but they did other stuff. He says he doesn't like her and they were just really drunk but sometimes I'm a little insecure about it. She's friendly to me and never comes off as strange, so I think I'm just being a little irrational. She's a lot prettier than me as well. I'm over at his house often and interact with her and she makes me uncomfortable (not anything she does). I'm sure if I talked to her she would understand but I don't feel that's appropriate. 

We'll both be graduating in a year or two so moving out isn't an option, not that I would ask. 

How do I deal with this?
<bot>: My boyfriend lives with someone who he's touched when drunk (but not sex). How do I deal with this and not feel insecure?