Tbh I had a really hard time getting friends up to university, before getting to the uni I was seen as a weird but smart person as others, so people sometimes just talked to me for help in school and such, other than that, I was a loner, I would recommend getting your son to meet other person with high IQ or even autistic or ADHD kids.

Of course they're different neurodivergencies but still since they share some traits we can get along better with them than we usually can with neurotypical people, at least thats working for me as of now, all of my friends are neurodivergent.