Unfortunately letting go isn't a strategy to gain your H back. It's a part of acceptance. Both of your H as he is. And the marriage as it is.
It is part of the grieving process. Unfortunately if you use it as a tactic - it's manipulation. And manipulation provides short term relief with some long term consequences.
Letting go is very hard. Re-read the detach section on the forum and then ask yourself... how can you detach from your H. How can you move closer to your needs and further away from caring how he responds?
"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