My darling.
I don't know how to say this, but I will try.
I'm so sorry for leaving you, I only did it to protect you. It hurts me so much to stay away from you, but since I know it is keeping you safe, I have to.
The only thing that matters to me is you. I only want you to be safe and happy.
Bella, I love you so much and I'm sorry I hurt you, but it was to keep you safe. You are the only thing that matters, I love you more than anything and I always will. Now since I'm gone you can have a normal and happy life without any danger. That means that it is worth it, even though it is hurting me more than I thought was possible, to stay away from you I have to try to keep you safe.
Isabella, you are my angel, my love, my life. I love you so increibly much. You are the only thing that is more important than my feelings.
I'm sorry if I hurt you, but you can move on, and have a happy normal human life. You will eventually forget me, but I will never forget you or stop loving you.
I don't even know why I'm writing this letter, I know I will never send it. I think I just have to tell you how I feel in a way. Even though you'll never read it.
Isabella Marie Swan, I love you with all I have and I always will. I left my heart with you, so please keep it safe.
Yours forever,
-Edward Cullen.

I miss you so much. Why did you leave me? What is wrong with me? Why did you stay for that long? I know I'm not pretty or exspecially smart or anything but you stayed with me awhile and told me you loved me.
Why did you do it? I love you with everything I have and I know that you are way to good for me, but still I thought you liked me. I know, I'm pathetic, How can someone like you love someone like me?
I just have to spill my feelings somewhere. Edward, life lost its meaning without you, when I think about you and that you don't love me, a excrusiating pain is ripping through my heart. It feels like there is a hole where my heart should be.
When the pain comes I have to try to hold myself together. I know you think I'll move on, but I can't.
I can't forget you, and I don't want to. The time I spent with you was the best time of my life, and I'm never going to forget it. I will always love you, no matter what.
When you left me, you took my heart with you, please keep it safe.
I love you, and I always will.
Yours forever,
-Isabella Swan.