I would strongly suggest that you take a look at who your OW really was. Right after DDay I had this idea that she was a loving caring person, that she helped others.
Finally after really looking at the facts all of my APs were just like me. Selfish Self-centered people who didn't really give a shit about their families or what they would be doing to the family or relationships of the people they were involved with.
You are looking back on a fantasy, a dopamine soaked non-reality, that didn't involve the day to day issues that real relationships really go through. In an affair there are no diapers to change, there are no bills, there are no real responsibilities. What you and your AP did was simply mirror back to each other. Agreeing with each other about situations and things happening in the real world and handing out sympathy to each other about how the world was against both of you.
I don't know if you have read "Not Just Friends" but it was an eye opener for me. However the best way that I got over was to simply take a realistic look at who I was having an affair with. Both my physical and emotional affair partners (I had quite a few if you read my sig) and realizing that they weren't really all that deep, or all that real.
You just have to start taking the sledgehammer of reality to the whole situation.
here is an example:
fantasy: My ap was a good mother
Reality: What good mother would leave her kids and husband to go out and fuck a stranger she met on the internet? Seriously no good mother would do such a thing.
I am not doing this to demonize my AP, what I am doing is looking at the reality. I was not a good father when I was in my affairs. I was a petty, angry man who yelled at his wife and kids, spent money that should have been used on them so that I could have a fantasy. I was insulting. I ignored my kids. I was a total and complete selfish asshat.
When I started coming to terms with what I actually was then I was able to apply it to all my fantasy relationships and realize that AP was not the "Amazing" and "Wonderful" person that my fantasy soaked brain thought she was.
Me-WS 52 Her-BS 51 Questioningall
5 kids DDay 12/13 (lied ONS)
Dday 3/3/14 - multiple EA, PA
TT ended in October when I had polygraph
"Good night, Sorrowful. Good work. Sleep well. I can always divorce you in the morning." Dread BS Roberts