i don't want to be too optimistic if this is all just a reaction to him being lonely, living alone and just missing life with his wife. i guess i just don't know what's real emotion and what's just his reaction to all of this.
It may be just a reaction, but it doesn't seem to be. Like you said, a 15k walk in the snow is desire, not just desparation.
I (and perhaps he) am trying to separate the idea of I love being married from I love you. Then looking back to see if it is the fear of being lonely, or the fear of missing someone I love that is driving me.
To answer your question, if the kids were adults today, I do not believe I would stay married to her, but I'm not big on loneliness till death. I'm sure that part of my stitch now is that I don't want to stay married, only to get the big D in 20yrs when I might be too old to be looking around. I'm definately trying again because I have kids. I had a glimmer of feelings for her this weekend that seem deeper though, so, if she doesn't kick me away because she hates being confused, I might be finding feelings I never had for her.
