God, it was a horrendous effort. Thank you for asking! For YEARS I patiently encouraged myself to find something good (or vaguely pleasing) about life every day; I can't explain what hard work it was! When I got to the corner on my little walk, I had to stand and look at the sky, or a tree, or a bird or something and think about how such things normally give people a bit of pleasure, trying to remember what that feels like. Eventually I did start noticing small things with pleasure, hurrah! The lights started to flicker ... it's a very uneven process, though, with a lot of backsliding. All these years later, I still get days and weeks when it's an effort all over again.
I have a lot of sympathy for your husband, obviously, and am glad he's got such a caring wife :) One vitally important thing, though, is that he has to take responsibility for his condition. Even though he can't see the point (I understand that perfectly), he's got to just accept that his depression will either go into spontaeous remission or he can get advice on helping his own recovery. What he can't do is rely on you to 'get him better'. It doesn't work like that, and is unfair on you. As long as he's adequately fed & watered, leave him to his own devices - and explain this to him.
The internet is a lifeline for those who're too tired, miserable and scared to connect with real people. It's worth recognising that, though, and putting yourself through a few small daily exercises so you don't totally forget the real world. Looking people in the eye is a really important thing - deperession makes you scared to do it, but you can get it back by remembering to practice!