Last year I dormed with my best friend, and everyone told us we were putting our friendship in danger and that we would end up hating eachother and blah blah. We lived together in a dorm room for a year, and nothing bad happened, we got along great just like we always had. Sure, there were times when she got on my nerves, but real friends can work things out I think.
This last semester I've been living with two girls I didn't know until the day I moved in, and I love them. I get along with one of them perfectly, the one with the annoying boyfriend is cool too, she just tends to talk your head off sometimes.
Now I have to find a place for the summer, so I'm moving in with an old friend from high school. We used to be best friends but grew apart. I don't think we'll have any problems, I'm easy to live with. (Unless you don't like the color pink.)

