I know that I've let you down and I am truly sorry. I hope you can forgive me
I understand that I have disappointed you and I want to apologize from the bottom of my heart. I know that my actions have caused you pain and I am truly sorry for that.
I hope that you can find it in your heart to forgive me. I know that forgiveness is not easy, but I promise to do everything in my power to make things right between us.
I understand that trust is something that is earned, and I am willing to work hard to earn back your trust. I know that it will take time, but I am willing to be patient and do whatever it takes to make things right.
Please know that I value our friendship and I am committed to making things right between us. I hope that we can move forward from this and continue to build a strong and meaningful relationship.
Once again, I am truly sorry for letting you down. I hope that you can find it in your heart to forgive me and give me another chance. Thank you for taking the time to read this message.