Oh I remember those days...I went to LSU, talk about a party school and the legal drinking age was 18 back then.
I wish I was you and had pulled myself out of it. You are doing the right thing.
Maybe head to the rec center, find some ski buddies, hit a coffee shop? The frat house is a dangerous place for a drunk. There are lots of people around campus who aren't drinking, maybe try getting out of the frat house and looking for them around campus?
It could help the loneliness!