Dear [Name],
I am writing this letter to apologize for my recent conduct. I understand that my behavior was inappropriate and I am deeply sorry for any distress or embarrassment that I may have caused.
My actions were inexcusable and I take full responsibility for them. I understand that I have violated the trust that you have placed in me and I am truly sorry.
I want to assure you that this kind of behavior is not typical of me and I am taking steps to ensure that it does not happen again. I am committed to changing my behavior and I am taking the necessary steps to do so.
I understand that my actions have had a negative impact on our relationship and I am committed to repairing the damage that I have caused. I am willing to do whatever it takes to rebuild the trust that I have broken.
I understand that words are not enough and that I need to demonstrate my commitment to changing my behavior. I am willing to take any steps necessary to make amends and to show that I am serious about changing my behavior.
Once again, I am deeply sorry for my conduct and I understand that I have caused you pain and distress. I am committed to making things right and I am willing to do whatever it takes to repair the damage that I have caused.
Sincerely,
[Your Name]