Dear Harry,
I want you to know that I am truly very sorry for all of the bad things I've done to you, Ron and Hermione over these last seven years.
I think, secretly, the reason I was so horrible to all of you was that I was jealous of your friendship. I wanted to have friends like the three of you, but everyone who was in my life were horrible people, and I think they were the main reason I turned into a person that I hated.
And then I became a Death Eater just because my family was threatened. I didn't want to do the job that He gave me, but I feared Him beyond anything else. When you discovered that it was I who had sent that cursed necklace, I panicked and attacked you. And then you attacked me with this spell. It was almost a relief because I had grown to hate life. I deserved to be hit with that spell for being such a horrible person.
I'm not asking to be your friend or anything. All I'm asking is for your forgiveness. You have no idea how much it will mean to me. I need you to know how sorry I am for all the damage I've caused over the years, and how much I hate myself for it. Please forgive me, Harry, for everything.
Sincerely,
Draco Malfoy
Dear Draco,
You don't have to worry about asking for my forgiveness. I understand you regret the path you took, and are truly sorry for it.
Don't blame yourself for becoming a Death Eater. I know you were doing it only to protect your family, and I respect you for that. And I regret everyday attacking you with that curse, I was afraid that I had killed you when I did that I still haven't really forgiven myself for it. I ask for your forgiveness for me causing you that pain, and I hope you can give it to me.
I can't speak for Ron or Hermione, but I will say that I forgive you for the things you did to us while in school. We are all human, and I think you just wanted to be happy and you just couldn't be without a true friend. I want you to know that I hold no hard feelings toward you whatsoever after all this time; I think you are a good person, no matter what others say.
I want to thank you for your letter. It showed me that anyone can be redeemed, and can learn from their mistakes.
In short, I forgive you for everything, and I hope you can do the same for me about cursing you in sixth year. If Ron and Hermione don't agree, don't blame yourself; I think deep down, they will always know you to sorry for your actions, and they will eventually forgive you. I hope you are doing well. Take care of yourself.
Sincerely,
Harry Potter