My W also feels that she's going to find happiness and nothing and nobody is going to stand in the way. She says, "Being a loving parent should not mean martyrdom."
But none of us left-behind-spouses want to keep our spouses at absolutely all cost. What we want is to not have our lives unilaterally robbed by the spouse. Not to have the marriage unilaterally nuked. Not have 50% access to the kids unilaterally revoked. If the marriage was doomed, I would like to have arrived at that conclusion together, somehow.
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final