I would never have an affair to "get back" so to speak, and I would not have an affair since I am still married and as such said in good times and in BAD, so no matter how lonely and sad I have been, and how nice it would have been to have someone "want" you or hold you, it is still not the way to go.
I guess if the M is over and a D is final then who cares in a way. I also wear my ring, perhaps even fondling it more than I did in the past. I can detach, and detaching does not mean not being married and it is still to try and become a better spouse that we are doing it so I think wearing a ring is fine.