PS I am not sure that believing your h had a full blown MLC is the better option! I think we were immensely well suited and very compatible, but all the issues clouded his judgment. Hard to let go of a happy marriage too.
Interestingly my xh has been very ill subsequent to his leaving me. It started about two years post bomb, but he ignored it/was misdiagnosed for a further nine months [I have had conflicting stories here]. For him the OW was toxic, as I think he now recognises
I have also been ill, but nothing like as seriously, and it was diagnosed early on a routine check up. So bodies do talk to us.
Either way the end of a loving relationship is extremely hard. Recognising the end has its challenges too.