Dear Lily,
I know that you hate me, but I have to let you know how I feel. I'm not concerned about whether I sound completely gay or not, because I could.
Lily, I have not gone after you for the thrill of the chase. I have gone after you because I love you. I am not lying when I say this. You may think I am, but I'm not.
All I have ever wanted for the last 3 years was for you to talk to me. Not yell or scream, or talk cruelly to me, just as if I was your friend. Maybe more than that, but right now I just want you to talk to me. I want to have a conversation with you. Find out so many things. I want to find out about your family, your feelings, why you hate me, etc. I know I sound selfish for saying all that I want, but I'm not trying to.
I would like to promise you that I could give you everything you have ever wanted, but I'm not superman. Don't snort at me! But I can promise you that I will love you forever.
Hear me out when I say, if you were to kiss me, and then Voldermort killed me the second I pulled away I would die very happy because I know that I got to kiss you once. I got to kiss the girl of my dreams. The only girl I will ever love.
I'm not sure what use to say, other than I hope what you are looking for in your life.
You are the girl who stole my heart and I don't want you to give it back, just look after it.
Yours forever,
James Potter.