Oh my gosh. OP - are you me?!?!?!
I really and truly could have written practically everything you've said!
As far as my marriage is concerned, I too look back and realise that making a distant man fall in love with me and marry me was like some kind of obsession that I clung to no matter what. I used to think that my world would crumble and I would never recover if he left me.
Now I am the one thinking of leaving him. It's like I have finally grown up and seen the light. Not sure exactly what's done this. Is it having children? Is it going back to work and being 'me' again? Is it just age and maturity? Or is it seeing for myself the kind of affection that another man can offer me?
So, to answer your question about moving on from an EA. I went slightly further down the road you are on. We kissed several times, we were very close friends, we kept in touch by text or e-mail all day every day for almost a year.
He showed me more affection in that time than dh ever has and quite frankly I would love the chance to get to sleep with him.
He feels more guilty than I do though (I am assuming because he has a better marriage than I do) and he decided about a month ago that we should cut the contact.
He's right of course. I respect that and I have left him alone.
So now here I am wondering whether my marriage has already ended. The little bit of closeness we ever had in our marriage was all driven by me. This last year, I have withdrawn all that and now we hardly ever touch each other or have a 'proper' conversation at all.
That said, I am in no position to leave and so I am using this time to put my life back together, so to speak. Focussing on work, friendships, and other outside interests. Keeping busy is my advice for filling the void. As for more long term decision making, I'll let you know when I get there!!
Not sure any of that will have helped at all actually, but I suppose there may be some comfort in knowing that other people go through similar problems. I wonder just how many actually? It's not something you can really talk a lot about in real life, is it?