Well, I'm sorry he's having these symptoms, whatever the cause, and that you are having to stand by and watch since he chooses not to get real help.
My big concern is for your kids, living in this environment and watching this deterioration and inappropriate behavior, including yours. Are they in some kind of counseling, or Alateen meetings or anything? You and your husband are adults making the choice to live this way. They are being forced to experience this.
I don't mean that in a harsh way, but I grew up in a home with alcoholism, codependency and mental illness, and my brother and I didn't have any resources to deal with the situation. The people we were dependent on were so caught up in their own sicknesses that our world was a frightening and chaotic place. Full of unpredictable moods and crazy ups and downs. I am still dealing with the fallout from that at 38 years old.