Hi where, have been away but thinking of you this weekend. Am glad you are getting some fight back.
I remember XH telling me, "we're separated now, you need to move on" as he swanned off for a romantic weekend in New York with OW just weeks after he'd finally admitted an affair. He then told me I needed to "pull my finger out, and get back to work, I wasn't going to ride on the back of him." I remember sobbing until I ached.
It was horribly cruel, but 18 months on, I can understand that the sort of man who would be so callous, is not worth wasting tears on. Your H sounds similar. You need to stop trying to understand him, and accept that he isn't the man you thought he was.
That can't happen straightaway while things are so raw, so maybe your best strategy is to avoid any conversations which don't relate to immediate practicalities or your dc's. Don't get drawn into anything else, it can only upset you at the moment.
And, if it helps, your reaction - to be totally devastated at the end of a long marriage, is entirely healthy and normal - his isn't.