You're at an age where friends come and go a lot because everyone is trying to figure themselves out. It makes sense that you would take it more personally, considering how your father treats you. And some bullying roommates.

But you are going back to school again. You have a chance to start over and try opening up a little with new people. There are nice people out there if you can find them. You can keep working on your mental health issues and eventually you will be more stable. And when you are older you'll find people become less judgmental, even about emotional and mental problems.

Hang in there! So sorry you are hurting.