Should I still hang out with them?

The only two friends I have at my school because I didn't go to the school I was origionally supposed to go to for some reason are really mean to me. They abuse me and yell at me and threaten me and hurt me and hurt my feelings and I'm small and quiet and shy and weak and helpless and I can't do anything about it. Sometimes I be really nice and do nice things for them like give them money so they can buy snacks at lunch and they'll sometimes share with me (they're really fat and greedy) I joined an extracurricular team that I don't even want to be apart of because if not I won't be able to see them sometimes. They're the only friends I have. We used to go to middle school together but they weren't so mean to me then. Please don't tell me to make new friends because I hate this school, this is my first and last year going here, and I don't like anybody at this school and I'm way to shy. But should I continue to be their loyal friend (they aren't loyal to me but I have two loyal friends at a different school) or should I ignore them and stop hanging around them and be alone for the rest of the schoolyear? Please help I have trust issues now. :'( (Also I have a crush on this boy who used to hang with me but one of my friends likes him too even though she had a boyfriend she said I can't like him anymore and he gives her more attention than he give me and I just let it happen. I hope I'm no being selfish but I hope I'm not being a doormat either...)