Cautiously, I think this is a good opportunity to set up a little trust and boundaries. You can't jump thruogh hoops doing things left and right to convince her of something she's already decided to not believe. I would tell her that you do feel differently. That you hope she is able to see those changes already in your behavior. But that only time will be able to convince her that they are authentic. You understand if she's not willing to take that risk, but you are not willing to do superficial things to convince her. That would be fake and she'd likely see through it anyway.
This way she doesn't walk all over you and set up a potential new R that's out of balance, and you've handed the decision to believe you right back to her. Confident in your position and unswerving no matter what.
Best, ~G
Me (36) H (42) M (12) S-8 D-5 SS-18 D Day (PA) 12/02 S 10/03 R 1/03 S again 9/07 I choose Joy.