Hello there, John, and welcome to PC

I know you are struggling with your addiction, the misery of it is the same no matter if it's alcohol, drugs, gambling, or gaming. A couple of useful links:

http://www.olganon.org

http://www.video-game-addiction.org/

Gamers Anonymous, the first link there, have daily online meetings that you can attend to share with others, and they run a twelve step program too.

You may find that working through your addiction helps with your depression too.