10:48 again. Depression is a nasty old condition. It really does rob its victims of the ability to use their minds to even see what is happening.
So sad about the DC's comment to DH- I know that must have killed him inside. There is nothing that devastates DH more than anything negatively impacting DD. But the good thing is that in my case even (many strides having been made over the past 48 house because of the discovery DH was actually hit on a regular basis during childhood_ and DH never hits our kid) is that the imperitive to protect DD from any negative impact of his depression (as much as is possible of course) is so strong its causing some major shifts in communication.
When DH comes home from out of town he does the same thing- exhaustion. No intimacy. Its the depression. As PP said, try not to take it personally, but its hard not to.
You are doing all the right things. Get yourself the strength to just deal with this "new normal" and also brace DH for the reality that a depression that is long time in the making is going to likely need medication. Have you heard of the book :"Anatomy of a Depression

I hear the authors interview on Fresh Air years ago and it was both haunting and upllifting. He got to the point where he could not get out of bed. And a phone call that he managed to pick up saved his life. It was a friend, to whom he said "Something is terribly wrong".