I’m sorry, that stinks. Something similar happened with one of my kids a few years ago. It stings, and I’m not sure what to tell you other than don’t internalize it, particularly if her reasons don’t feel valid. She probably just hit it off with someone else more and wants to shift blame. However, if it’s something you can control and that rings true (like cleanliness, etc) it will be good to keep that in mind for your next roommate.
Try to hang out with other people if you can and just give it time.