Wow, your post really resonated with me. I struggle with the same thing, really letting go, whatever that is, is currently not in my bag of tricks. I mean, I have detached quite a bit, I am fully aware that H may never come back, that I am responsible for my own happiness, but to not keep at least small hope alive...that I do not know how to do. And, like you, it seems to me that letting go is usually what gets them back.
I like your list of things to do for yourself. I am trying to make myself do more for me, too. I am going out with some ladies this Saturday and making myself go to a group Tango class, by myself (gigantic 180 for me), on Monday night.
I have been meaning to post to you. You are so kind to me and always pop in at just the right time to encourage me. Thank you.