Before you can save your M, you have to save yourself. You need to back off and leave her alone. Stop trying to plead you case to others. Detach from her and get professional help for yourself or you will continue to have this inadequacy issue (even new relationships). It will take al, your focus on yourself, which will be a good thing. Then, you can see if it's too late for the M.
What she said^^^.
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016