College, dorms, and roommates

My house was near my University, so I lived at home. I can't see myself living with a room mate from school, when a lot of people are still fairly immature. It would probably drive me nuts. I remember being on a call with my friend and she told me that her room mate just brought a guy over to their room and started having sex. wtp? D:

Now that I'm out of school (been for a while), I'd consider getting a room mate so long as they are also a career professional, serious kind of person. I'm kind of surprised that people do this. I'd still prefer to live alone, however.