Oh goodness me, what a terrible situation. To have both of you in the grip of depression is really awful.
I know what you mean, often it's the mother who has to keep going, keep food on the table, keep the clothes washed and put away, washing up done etc. no matter how bad she is feeling there is that instinct to keep going for the sake of the kids..
Men don't seem to have this same instinct, or not to the same extent anyway.
Unfortunately depression is an illness. Your DH's behaviour is actually very common in depression. Retreating from the world because of an inability to cope anymore. I know this is very hard on you, but he really needs professional help - he is unlikely to pull out of a serious depression by himself or because you shout at him to pull himself together.
Depression does cause many marital break ups and I am really sad about this, because if only there was more support available these marriages could possibly be saved.
When I was in the grip of depression I know I was a nightmare to live with and very difficult to have around. I couldn't be left alone I was such a wreck. It was a terrible strain on my DH. However, he stuck by me. I got the right help and I am well now and we are happy again.
Are there specific things causing his (and your) depression that need addressing? He may be able to get CBT on the NHS if he goes for help. Certainly he should be on anti depressants if he's not already.
What about you? What support is there for you? Do you have any family or a close friend you could confide in?
Sympathies, you must be going through a really rough time
x