Hello, trimommy, and welcome to Psych Central! Is your son 18 or older? If so, then he is responsible for his own treatment. We do have a social group for parents of adult children with mental illness, if you would like to join. Here's the link:
http://forums.psychcentral.com/group...ll-adults.html.
It's unfortunate that his brother can't be around more. But I don't think it would be right for him to have to give up his social life.