Could you work PT around school? Call me crazy, but I love going to work. My job can be stressful and hectic but I like the social aspect of it. When I'm off work I go to school, but the last couple semesters have been online instead of up at the campus, so socially I don't see anyone. I'm kind of asocial/ambivalent about humans a lot of the time!
People are great in theory, not so much in practice. Seriously though, maybe a PT job? Or some type of group centered around a hobby.
Booze as a social crutch is probably one of the biggest reason that so many otherwise-normal young people start drinking. A little is a social lubricant, but we can't take just a little lubing- we tend to get greased!
Hang in there, A. Rome wasn't built in a day. You can figure something that will help you social but preserve your sobriety.