Sounds like you don’t like the answer, which is that you can talk to her about her behavior and hope that has an effect, but otherwise you have no option except get over it. The rent is being paid. You were lucky to get a couple months by yourself. Most people deal with roommate stuff all the time without breaks like that. Sounds like your amazing set up was just temporary, but it’s still cool you had it. Now you have to adjust back to what most normal people have to deal with.