And maybe when you come home from having a great day you say "How was your day, H?" and get his answer, which you DON'T INTERNALIZE. And then tell him "We did xyz and had a really fun time. Maybe you want to come with us next time." And leave it at that. If he says no, just say "OK." If he says yes, then great, Share the details at the right time. Try different things on and see what works in terms of drawing him out.
Maybe a goal can be getting him to accompany your family on an outing sometime. But dont' do it like a bull in a china shop. Be light and subtle like a ballerina. If any of that makes sense!!
And Timbits is right....his mood doesn't mean you can't enjoy life.
Again, good luck.
Share some positive emotions with the poor guy. He might just be waiting from that from you, and it's hurting him that it's not coming.
