The honest truth is you did the best you could with the tools that you had at the time. You have to forgive yourself and move forward. I get the sense Your H is a needy person and his track record in relationships isn’t very good. Pretty sure he’s not looking at his side of the street. There are bound to be problems in his new relationship at some point so at that point he may want to comeback.
If you stay on your path my guess is you would no longer be interested.
