We've lived together for almost 4 years, and never had more than a small disagreement, but I'm confident our friendship will not last much longer if we continue to argue about things that are either disrespectful to me or my friends.
The thing that got to me the most was this past weekend when she found out I was going out with a group of people that she doesn't like to hang out with (she really doesn't get along with more than a few people) and she got mad at me. She said "I'd go out with them if it meant that I was already drunk." and she laughed it off, not even realizing how bad it sounded.
I'm questioning our friendship at this point, and feel fine with dropping it. No wonder she hasn't had a best friend since elementary school.