I agree with the others - some kids just aren't great socially, but I think thats good, gives the other kids a chance to learn acceptance

I don't think you have done any damage to your son - at all.

I'm 36 and still socially awkward, and have more friends online than I do in real life. And I was never homeschooled (although I went to LOTS of different schools during the primary years so that could have attributed to that lol)