My son had the same problem his freshman year - his roommate starting drinking at 9 am and continued all day. My son found some good friends down the hall and spent a lot of time with them, he always worked in the library every evening and spent as much time as possible out of the room. Obviously the roommate flunked out and this year he is rooming with the friends he made. A really nice group now. It doesn't make the first year easy but he did find a way around it and is a better person for it. Good luck!