Block his facebook page. Ask him to change his password for his log-in.
And if you need to, just leave the house. You only have 12 days left. Is there someone you could stay with? Is there a possibility of staying at a motel for a few days?
Leave his vodka alone. And he is only calling you "fat" because he knows that it gets to you. If insulting your wardrobe would accomplish the same thing, he would do that.
DROP THE ROPE. This is only hurting YOU.