My heart goes out to you, you tried everything you could. There so much we can handle, after all those years of trying you need may be some peace... Home should be a place when you can let it go and find peace.
It seems that you H has been taking you for granted and engaging in those conversations with another woman while still married is a huge red flag. Respect is a must. Without respect no relationship can survive.
I have been absent for a while I have been having issues on my own, I have been struggling again with anger and a few events triggered in me if it was worth it to keep going on... I still don't know...
Me 52+ WH 57+ Married 20 + Piecing since 2016 (ready to give up...)