Husband Threatened to Leave, Don't know what to do

[Lll54]

Anybody have experience with mental disorders such as depression?

I'm trying not to diagnose or mind read, but....

H just came and met us and warned me and said I probably should stay away. He hasn't been this grumpy in 3 years...I didn't ask why. Then he came and sat and started crying and said he couldn't sleep again and has a headache. He went to workout and just drove around crying again. Told me it isn't me...he doesn't know what it is. Said he is just having a sad sad day an doesn't know why cause he has a pretty good life. Told me he doesn't wanna scare me but he is just being honest. I asked him to see a doctor, maybe he has depression. He said no. He told me about 15 million times how good of a mother I am for bringing the boys to play at the baseball diamonds rather than sitting in the house.
I told him he is a good dad too and he said no he isn't. If he was off work he would probably be at the gym...he was being sarcastic cause he has been working out alot lately for his training but putting himself down at the same time.
He is responding to my affection and stuff...but there is something wrong. I don't know what to do or say....I'm at a loss