I've owned how I hurt her, I've apologized deeply and sincerely to her, and I've clearly and consistently shown I'm not like that anymore. What else can I do?
As far as she goes, there is nothing else you can do. She knows that you owned hurting her and that your apologies have been deep and sincere. And I believe that she knows, as evidenced by your clear and consistent behavior, that you're not like that anymore. Trust yourself and respect yourself. And, you can continue to grow and learn and become better and stronger in every aspect.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.