Your feelings sound completely natural to me. I'm wrestling with similar feelings in my sitch.
Standing is not for the weak of heart. It requires faith that your sitch will evolve, that your W will eventually value you again and your M can return to good health. I believe in the sanctity of M, I believe all M's are tested at some point, and I believe it is worth fighting through these difficult periods. I am not religious, however, and I don't have that extra faith to draw strength from. I am realistic. I have zero idea if or when my W may "come around." And once I see some of these fleeting glimpses of a future happiness on my own, that does weaken the stand.
Also just want to say -- your kids may suffer MORE in an unhappy M.
