Your H needs to FEEL the pain of loosing you. This is one piece of the puzzle that I have seen work. It does not make sense, but it works. Read as many of Puppy Dog Tail's posts as you can. His advise is based on getting the results you want.
Find the boundaries thread and read 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