How do you write an apology letter to your best friend?

 Example 1: Format of  apology letter to your best friend

Tell them you are truly sorry in a way that shows remorse and empathy. Admit your part in it and the negative impact on your friend. 

I am truly sorry that I said too much, shared information that wasn’t mine to share, and spoke carelessly. I see now that it put you in an awkward place.

I feel terrible that I hurt you, and understand if you feel you can no longer trust me.

Example 2: Sample of Apology letter to your best friend

Make the situation right. Take action to make restitution.

Your friendship is very important to me, and while I can not take back the things I said, I want you to know that I will do everything I can to earn back your trust.

I would like to meet for lunch to let you know how much I care, and to apologize in person for being careless. I truly did not mean to hurt you.

I hope you will give me another chance to be in your life because I do care about you.

You can find more apology letter format to friend, boss, colleague and etc at https://www.hrhelpboard.com