
Yeah no, she can go to their places sometimes. Stop leaving the house and tell her that you want to be able to use your dorm on the weekends too. She can’t play default host and essentially kick you out of your own dorm. Her choices now are to take the party elsewhere or deal with the fact that you live there too.
I told her sometimes she can go party somewhere else and she was like "oh I'm not that extroverted to be outside all the time. So I need to hang out with my small groups of friends here" but the real reason I think is they all underage drink dozens of bottles together. I'm going to try to put my foot down around finals and any major tests I have coming up so I can comfortably study