A dead girls tears

My name? I can't remember. I think it had an E or an I. Maybe an B? I don't know. I remember a few things from life. Serenity Elizabeth Warner. My best friend. My everything. My world... My killer. I'm stuck in this world. I want to be helped. Will you help me? You don't have to. Nobody ever does. You will? Thank you. I won't forget this. Well, I'll try not to.