Thanks for sharing. Sorry you find yourself in this so familiar situation.
My main advise is to make positive changes to YOUR behavior. Start by challenging your current beliefs. You are going to get so much advise, sometimes it will be conflicting. As much as you think this is about H, it is really about you and how you want to make positive changes to your life.
You will have to evaluate all of your options, make a choice, and live with the consequences of that choices, good, bad or otherwise. Then rinse and repeat for the next set of choices.
Study up on setting and enforcing boundaries ASAP.
You have a whole group of people here that can help you move through this difficult process. It was the best worst thing that I have ever experienced. Crazy looking back that I am glad to have gone through it.
You can handle it.
HUGS
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712