[themodelplumber]

You should be careful here and make things more objective. If you are looking at rational cues e.g. "socializing and good grades" and concluding that he needs a change, we can also say that you are being irrational wrt the social-norms bell curve.

A lot of mental coding goes on inside the mind first, and some people have an inner coding voice / logical internal monologue.

In such a case he's definitely coding all the time. So social life might even be therapeutic in quieting the inner monologue, so to speak. And that's just one example...

Good luck and always a good idea to let him know you are available to listen whenever.