That may be the case but the OP has stated that she has had many conversations with him about it over the years. If he doesn't recognize it himself that is one thing, but it seems that the OP has made him aware of how his behavior is effecting the family. Saying he doesn't recognize it can't be used as an excuse for not getting help at that point.
And FTR, he stated he was depressed at one point, so either he was lying, or he does recognize it.
I do not think she meant OPs hubby did not recognize that he had depression (as he actually mentioned to her that he thought he did), but she meant that he has not recognized what damage depression has done to his family and marriage, should that be what his issue is.
Tiger