In my first 2 years of college, I lived in a dorm. Single rooms are more expensive so I chose to share a room. My first roommate was in a sorority so she was absent a lot. Plus it got kind of awkward especially when she brought her boyfriend over. Sometimes her boyfriend looked at me and she thought I was making moves on him, so our relations soured a bit. Plus I was socially awkward so that didn't help. But we parted with no hard feelings.
My second roommate was also social and would often invite her friends over. I panic around large numbers of people so I often escape from my room every morning. Plus I think she used to make out with her boyfriend when I'm not around. One time when I was getting ready to leave the room, she told her boyfriend "I'm not wearing any underwear..." and then they looked at me and that was my cue to go. She's nice, but we never became friends or anything.