Thank you all so much for your support and for all the replies. To answer a few questions: yes, he is living on campus. He has been there since Tuesday and they have kept the kids very, very busy with tons of activities; many of which are NOT optional which is a good thing. Today the rest of the student body moved in and they will begin classes on Monday.
He is not the type of kid to call home (hasn't called at all once) and does not open up easily at all. I'm trying to give him some space and for him to come into his own, but if I don't hear from him by tomorrow, I'm calling him.
I actually tried to get him to go to a different college where some of his friends were going, but he said he didn't want "high school, part 2". Unfortunately, I think that's exactly what he got here except no one's from his high school.
I am sending him his shin guards hoping that he will play intramural soccer. I KNOW he misses being involved in a sport and being part of a team. Frats are out of the question for him.
I guess he knew there would be drinking going on, but didn't realize how much.