Yes, MarchingFrogs, that would be my ds.
He wants to study, read, eat, sleep, do his own thing. He doesn't see the point of "banter" and only likes "serious" conversation. Can't bear drunk people. At school he preferred the teachers to the other people his age.
He is "extreme," he's also autistic or you could describe him as already about 65. Some of your dc would describe him as "boring," he would think that it's "boring" to drink and talk about non-topics.
He's making friends on his course (of sorts) but he'll only really want to talk about the work with them.
Horses for courses, so his course is to stay at home.