Like you I have good days when I think I am detaching well and then bad days when I can;t get him out of my head. But luckily the bad days are getting less.
I also read everything and drive everyone mad as I need to have an understanding as why the man I chose to spend all my life with changed so as I don't recognise him and left to be with OW.
I have a long way to go yet. But I am learning about MLC, H and me all the time.