"I am just old reliable me that is happy to spend time with her or the kids at any given moment."
Well, therein lies the problem I think.
"Should I just contine with this arrangement or do something differently?"
I would never advocate dating whilst still M, or for a good while after D - so I am in no way suggesting that. However, I would begin to make plans for yourself that involve meeting new people in social, educational, volunteering or whatever settings. Whatever floats your boat really.
It looks as though your D may be about to finalise. Do you still want to be same old you waiting for your W to call and suggest doing something. Heck no - I would get out there and take life by the horns. What have you always wanted to do but never gotten around to it? Well, now is the time for that I would say...
It also seems perfectly reasonable to adjust the care arrangements for the kids. Yes they need you both - but they don't need you both caring for them together if that doesn't work well for you.
Hope this helps a little and good luck with things.
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