I suffer from depression, too, and I think it is a direct result of being social phobic.  In the past years, my SP has gotten a lot worse, and accordingly so has the depression.  My self-esteem is below zero.  I used to be able to work, socialize to some degree, and not be afraid to do new things.  Now all I do is stay buried alive at home and watch while the rest of the world lives their lives.  I feel so inferior and like such a loser, and I am confronted on a daily basis by the extreme contrast between myself and the wives of my husband's friends, or the mothers of my son's friends.  I feel like I am the only one who doesn't work, who isn't interested in fashion and shopping and gossip.  They all look at me like I'm a disgusting cockroach.  So yeah, I'm depressed as hell.  I wish every day that I could just go to sleep an never wake up.  People aren't put on this earth just to suffer.