Well things are never dull around your place - that's for sure.
Your H is really struggling. But you need to let him struggle and be supportive without enabling him or getting caught up in it. This is about him and his unhappiness - it is not about you. You are a kind, generous and caring spouse who has put up with more than her share of heartache and pain.
He does have to hit bottom before he can begin the climb back up. Someone mentioned calling the cops to let them pull him over leaving the bar. You know, this is very thought provoking. As he gets near the bottom, the last thing you want is for him to get hurt or hurt someone else. There may need to be some type of catalyst needed to make him seek help. Don't rule out giving things a gentle nudge - but you will know what type of nudge is the right one for your situation.
I don't have experience with alcoholism, but maybe Akgal or others will offer their insights. I know it is his battle, but there are others (you and S4) involved.
You amaze me with your patience, your resolve to not give up and your ability to have a life outside of his drama. Keep up the faith and the strength will continue to follow.
totite
"Accentuate the positive, eliminate the negative..."