I ruined everything

I want to start by saying I cheated on my ex. When she found out, it hurt her so much but she tried working through the issues with me. We were together for almost 5 years and throughout our relationship I was so indecisive. I would break up and get back with her multiples times to the point where she would never know what was going on in my mind. I broke up with her for the last time on July 17th and absolutely broke her trust by going out on a date with another person 5 days later while we were still living together. She asked me not to do this and I promised her that I wouldn’t🤦🏾‍♂️. Even after that happened she begged for me back as I moved all of my belongings out of the house and I completely ignored her as I did that. Finally 2 weeks later I reached out trying to fix things and she made it clear that it was over. I can tell how difficult it was for her because she never had the courage in the past to finally end things. It has been 3 months now and I have been heavily working on myself. I lost over 30 lbs, have been consistently taking therapy, and have been reflecting on my past behaviors because I truly do want to change as a person. We still stay in contact due to the fact that we own real estate properties together but I’m hoping 1 year from now she will still be there and will recognize that I am a completely different person. I hate who I was in the past and never want to do that to anyone ever again. I know I don’t deserve any kind of sympathy but I truly want to be different and would ask for anyone’s support/advice through this difficult time.