Making these changes in yourself came with a hefty price. The real test will be to make these changes a life-long change.....and not some "reaction" to a dying M.
If you can really drop the rope and set her free......and move forward, happily, there is always the chance the A will die and she'll begin to miss the man she fell in love with and M......especially when she begins to see him surface in you.
If that happens, then she will begin to do little things (pursuing you)and your part is to be very calm, confident, and no falling back into her web. If she wants you again, make her work for you.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
