I am writing to apologize for my dishonest conduct. I understand that my actions have caused you a great deal of distress and I am truly sorry for that.
I understand that I have broken your trust and I regret my actions. I should have been honest and open with you, and I should have taken responsibility for my own actions instead of trying to cover them up.
I have learned a valuable lesson from this experience. I have realized that honesty is the best policy and that it is important to take responsibility for my own actions. I am committed to being more honest and open with you in the future.
I understand that my actions have caused you a great deal of pain and I want to make it up to you. I am willing to do whatever it takes to make things right and to rebuild our relationship.
I hope that you can find it in your heart to forgive me. I am truly sorry for my dishonest conduct and I am committed to being more honest and open with you in the future.