I cannot offer any ideas, but I completely understand how you feel - my daughter went through something very similar in her second year at Uni.
Her Uni is close to home (about 25 minutes travelling), but she decided to house-share with some friends in her second year so she could be more part of the social side .... she shared with a girl she had been very close to at secondary school, and a guy who turned into the other girl's boyfriend. They totally shut my daughter out, left the communal areas of the house a mess, hardly spoke to her (or were openly hostile - making it clear she was 'in the way'). It made my daughter ill - she desparately wanted to move out and tried very hard to find someone to take over her room, but failed. In the end, I paid her rent for the last 4 months and got her home and well again. She is fine now, in her final year - she still lives at home, but she is fully involved with the social side of Uni, and stays overnight with the REAL friends she has made when she needs to.
Hang in there (sorry - no pun intended!) - it will get better.