Dear Sam,
I sincerely apologize for how I acted last night at your birthday party. I’m sorry that I spoiled your day. I am sorry for causing a scene in front of your family and friends. There is no excuse for what I did. You know that I don’t drink, but then I succumbed to the egging by some of our friends.
I was completely unaware of what I said and did at that time. I was out of myself because of the effects of the alcohol. It was only Jane who told me of the things that I did to ruin your party. And I am really sorry for that.
I know that you have so much trust in me that you came all the way to our house just to invite me to your party. But then I messed it all up. I know you regret having invited someone like me to join your party, I just spoiled it.
Please forgive me. I will do anything to fix this, and I will talk to your parents about what happened. I’m the one to blame for what happened. I am really sorry. I promise you that this will not happen again in the future. I hope you can forgive me. I don’t want to lose our friendship.