It's good that you saw why you made the changes, and they were for her. Now make these changes for you and only you. Let's say that she leaves and can't see your changes. Now you are stuck with you to reflect on what went wrong. Look in the mirror and decide what you need to work on for you, how can you become a better man for you? Get a haircut, buy new clothes and start with something that's noticeable on the outside. Start a new hobby like, bike riding or something like that. Then work on yourself from the inside and make those changes stick for you.
My WAW still notice my changes and she's doesn't like that it took her leaving for me to change! But I was never a bad guy and she's still pissed after 9 months of being gone. I think that she understand that it's her loss, she got the D ball rolling and it's too late now.
Me: 37 WAW: 31 M: 6 Years No Kids BOMB: 9/4/06 D: 9/16/07 my sitch