Sorry to read about OM, I think you are on the right path with starting new process with new mindset. I think this is what happens with each new BD event. Its like starting over with DBing and the past work makes the new BD easier to get past.
If you can stay on the path of dropping the rope and working on yourself and your new life then you will be in a good place. I had trouble with that and still do. What you wrote in the last paragraph is so true , try to have no expectations of saving the marriage. Use this time you have to your advantage.
Me late 30's W mid 30's T 15, M 10 S4, S7 ILYBNILWY June 2015 In house S July 2015 W rings off Oct 2015 My ring off Feb 2015 Separate houses June 2016