Dear [Name],
I am writing to apologize for the hurtful words I said about you, and for the damage I caused to your reputation and character. I understand that my words and actions have caused you immense pain, and I am truly sorry for that.
I regret my actions and I understand that my words were wrong and inappropriate. I take full responsibility for my actions and I apologize for any hurt and embarrassment I have caused you.
I understand that my words and actions have not only hurt you, but have also hurt your family. For that, I am deeply sorry. I can only imagine the pain and suffering that you and your family have gone through because of my words and actions.
I want to make things right and I am willing to do whatever it takes to make it up to you. I am willing to meet with you in person to apologize and to discuss how I can make amends. I am also willing to take any other steps you deem necessary to make things right.
I understand that my words and actions were wrong and I take full responsibility for them. I hope that you can find it in your heart to forgive me. I promise to never do anything like this again and I will work hard to restore your reputation and character.
Once again, I apologize for my words and actions and for the hurt and embarrassment I have caused you and your family.
Sincerely,
[Your Name]