Hugs to you, sweet Abalone.
I am carrying a lot of guilt and shame for certain. While I fundamentally know that I did not cheat, I did not end the marriage, I did not do anything wrong, I still feel addled by the weight of the ickiness of everything. I feel enormously embarrassed and like a lot less than I used to feel, and that I was not enough, certainly not worth being faithful to or respectful of by him. Just the reality of what I am feeling, deeply, even if I intellectually know that it was not my doing.
Who knows what is really being felt by him, but he is definitely applying this crazy optimistic filter to his life (well, what I witnessed him doing when we lived under the same roof). The gambling trip, sending the smiling selfies to his friends, meeting up with buddies for drinks, reading fiction and watching his blooper videos and sports, researching these never-going-to-happen job opportunities. And he has no job while still getting income, no wife or kids to have to deal with, nothing but wide open free time with no responsibilities.
I do definitely seem to be zoning in on the happy marriages around me (seemingly). Because I had it and I miss it and I want it still. Desperately. I miss wearing my wedding rings, I miss saying "my husband," and I miss having and feeling and being viewed as having the stability of a partner who is by my side. It is just a lot of jarring changes that are now actually happening vs. waiting for it to happen.
Every situation is different, Abalone, including yours. There are many, many good, necessary, important reasons to try to make a marriage struck by infidelity work. We know from so many here that it CAN work, it can even sometimes be better than before, and it can take work but can happen. And I will venture to say that even if a relationship is still a struggle in the aftermath of affairs, and has fractures and setbacks, that there can still remain enough there to make it a life that can be happy, even when there may be more downs than ups some times. You have to do what is right for you (or the kids), and what is right at one time may always be right or may change with time. The important thing is to continue making the best decisions you can given the information and circumstances you're given. For all of us, right?