Dear my darling Lily,
Merlin, I am so sorry. For everything. Anything. For calling you a Mudblood in our fifth year, for treating you like utter dirt ever since. You have to know I didn't mean it. Oh... well I did, but I wasn't thinking! Lily please! Please believe me when I say I need you. I need you so much. You're the only person who ever takes the time out of their day to talk to me. No one else does that. No one has ever done that. And they won't ever do it.
Lily, I don't deserve you. Darling Lily, please know that you and James should be together forever. Whatever I say, just don't pay attention to it. Stay with James. We may not like each other, James and me, but that should not change anything. I will only ruin you. Depress you. Bring you down. All that. I am the worst person for you.
So why am I saying all of this?
Well...
I love you. I love you so fucking much, Merlin damn it! Lord if I could get down on one knee and propose to you knowing you'd say yes I'd do it right now!
But I won't.
And I never will.
I'm sorry, but we can't be friends. We can't know each other. Believe me when I say that I only have your best interests at mind. I bloody well love you. Do you know how much it pains me to write this letter? I wish I didn't. I wish we were together, holding hands, kissing. I'd run my hands through your hair as you laughed like you do when James do it to you.
But James, he's so much better for you, Lily! So much better.
I've made some friends Lily, and they'll only hurt you. I don't really know why I called them friends. They're not at all.
Just... for your own sake, cut me off. Don't know me. Forget me.
But know this...
I'll never forget you.
Sev.