Ruby100, I just read your story and my heart goes out to you.. I know exactly how you feel.. I am learning the hard way that detaching and 180 are the best thing to do..
my H and I have been married for over 30 years. in 2015 I found out he was cheating on me , he met ow in may and by july he was in love and had to be with her.. ( he's mid 50s and ow is mid 30s divorced with a small child ) by the end of 2015 he left me for her and moved in with her and has been living with her ever since.. he has not asked for a divorce and actually gets angry if I bring divorce up to him.. I have not seen him in 2 years.. he's been with ow for 3.5 years with no end in sight. i truly understand your pain ..
I have only recently started 180/last resort...i am simply at a point that i do not know what else to do.. i will keep you in my prayers..