avadak
I think he really needs to see a Psychiatrist. IMHO, he needs to be diagnosised by a Doctor that deals in mental health issues.
There are many successful ways to deal with depression, including lifestyle changes, therapy, medications, and alternative treatments. Please help him find a good Psychiatrist and remember you cannot force him into anything.
Here is a video that may help you.
http://it.truveo.com/How-To-Help-Someone-That-Is-Depressed/id/1126119380
Keep on talking to us, we care and also remember to take care of Number 1, yourself.
Gentle Hugs
Kitt