"So what do you do if you don't work or go to school?" This was actually a brilliant line of questioning for him. He was supposed to be here for school himself, and he'd yet to enroll and didn't really want to. "Or what do you tell them you do?"
If he could find a satisfying answer, perhaps he would adopt it as his own. If he kept telling people he was here for college, they were going to start asking him why he never spent any time studying, or there was even a possibility of somebody trying to find him on campus and finding out he wasn't even attending.
He had a backup of saying that he wasn't quite adjusted and he was waiting for the next semester, but that would only work once. When that came and went and he still wasn't in school, things would get bad.