Hi Roist, sorry this weekend is a tough one. It's really helpful not to make big decisions when you are finding things tough. Let a little time pass and let yourself settle, then you can see where you are at.
I have never walked in your shoes - my XH veritably sprinted out of our marriage, so I haven't experienced the 'trudging along' as you describe it. It must be hard and I think it is the right thing to do to dig deep - particularly when you are a long time married and have children and property together. So, I don't think you will come to regret the struggle and the standing.
FWIW, I think you do fantastically well - and your 'fairly well' below understates things. We should not under estimate the effort needed to try and sustain a relationship during times like these - when we are hard wired for connection and we so crave it.
I don't have any answers better than this. But I do think if you operate from your most thoughtful and persistent self, and act in accordance with your values, you can never go too far wrong.
Best of luck from one of your fan base
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus