But maybe we should be just planning to get on with our lives and not wanting them to come back and treat us like this all over again, a second, third or fourth time? Working to accept that the relationship is over, could be more realistic than hanging on to it and will still work towards GAL and detaching.
This is where you have your "non-negotiables" completely defined. If they come begging you to take them back, at that point you ask them what they are willing to do. Most likely they will not meet your requirements, then you let them know "that is not good enough". Right now, you have much work to do on yourself and do not need to use up any energy in the hypothetical world.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712