I know that his therapists likely can't talk to you about him due to HIPPA but are they open to hearing what you are seeing? If you can make sure you bring up the social difficulties as they may indicate something more than just depression. Support groups may not be his thing if social skills are an issue and may be draining him more. I know that WOW can be very addictive so you may want to ask about that in the addictions forum (??? I don't venture over there much so... just a thought).