As a man who suffers from depression, I have a lot of empathy for your husband, but I also believe he is selfishly manipulating you somewhat.

I am very seriously depressed, every single day, but I manage to drag myself off to to a job I hate and I do the things that I have to do. I don't have the energy or enthusiasm for anything extra, and I'm not necessarily much fun to be around, but I make a point (for my own self-respect) to handle the basics.

You have the right to demand more from your husband than what you've been getting. Don't let him put a guilt-trip on you. Any hope for his recovery requires him placing more emphasis on self-discipline. You need to remind him of this as often as it takes.