Just a reminder that life will teach him everything that you so desperately want to tell him.
Just like an alcoholic or an addict your husband needs to hit a bottom before he can see anything.
You could not see the things that you needed to change until the bomb. Sometimes we don't learn anything until we hit bottom. Continue to work on the things within you that you want to change. Joins support group for divorce or at your church or alanon.
It has helped me so much to make local friends that were also going through hard times. I felt like I couldn't be real with the school moms I was friends with or work friends.
I don't know if this rings true for you but your h seemed like he was in denial for so long about his feelings. He stuffed so much. Rather then talk to you about lack of sex he stuffed it.
Your h considers himself a "good guy" not a womanizing like tony soprano. When he met this female work friend rather then being honest with himself and admit he thought she was hot he stuffed those feelings. But those feelings were still there. Slowly he was able to find tons of reasons why you are so awful that he had no choice but leave you. He will eventually have a sexual relationship with the co worker if he isn't already. Hopefully this will get it out of his system.
This had very little to do with you and has to do with him not knowing who he is and not being able to be honest with himself.
Take what you like from my above hypothesis I'm probably projecting too much of my own story.
Big hugs
---- M 39 H 35 D5,D4 M 4 T 9 ILYBNILWY 5/18/11 Left 7/11/11 Divorced 12/1/13