So I’ve joined up just to message, I could have written your post 5 years sgo! I am now (very recently) happily married, and happier then I have ever been. I never thought this would be possible, and it took me such a long time to get over what my ex husband did to me. We had been together since teens - 30, had children and he just walked out due to an affair, left me shattered
I spent a long time putting him on a pedestal, like he was some god, but I read some self help books, and one of them made me see him for what he was, and made me fall out of love with him (very painful and very slowly, but worth it for the outcome).
My best advice would be to read some self help books, I can tell you the ones I used if you want, make yourself feel good, and in time you will start to feel happier and ready to date again.
the best thing I did was to force myself back onto the dating scene, my confidence was at an all time low, but seeing they other guys where interested in me, made me feel like I wasn’t the problem and slowly my confidence started to come back.
definitely look at moving, being surrounded by old memories is painful, when you feel ready.
please message me if you want to, but take my word for it, things will get better!!