I am sorry for not being the person that you need me to be. I promise to work on myself and to make things right
I want to apologize for not being the person you need me to be. I know I've let you down and I'm truly sorry for that. I understand that I've caused you pain and frustration, and I want to make things right.
I promise to work on myself and become the person you deserve. I know it won't happen overnight, but I'm committed to making positive changes in my life. I want to be someone you can rely on and trust.
Please know that I value our relationship and I'm willing to do whatever it takes to repair it. I understand if you need some time and space, but I hope we can eventually work through this together.
Again, I'm sorry for any hurt I've caused you. I hope you can forgive me and we can move forward in a positive direction. Thank you for your patience and understanding.