May, I don’t have anything else to add but just wanna send you some virtual hugs. I can’t imagine how you’re feeling right now. I think you’ve got probably all the 2x4s you need here to move forward. Is it possible to arrange someone to take the kids for a day or two (other than H) while you process all of this? You gotta get your ducks in a row. You’ve done it before, you can do it again.
You gotta focus on you. I understand what you said about knowing that H is in pain too etc. but you can’t be responsible for his issues. Your life can’t go down with him because he’s suffering. You have your life, and your daughters’ lives to think about. You can have compassion for him but at the same time decide that you don’t want to be a part of this charade.