BLAIR : A letter. I wrote it to you when you were away at boarding school. I never sent it. Dear Serena. My world is falling apart and you're the only one who would understand. My father left my mother for a 31 year-old model. A male model. I feel like screaming because I don't have anyone to talk to. You're gone, my dad's gone, Nate's acting weird... where are you ? Why don't you call ? Why did you leave without saying goodbye ? You're supposed to be my best friend. I miss you so much. Love, Blair.
SERENA : Why didn't you send it? I would've..
BLAIR : You would've what? You knew, Serena. And you didn't even call.
SERENA : I didn't know what to say to you, or even how to be your friend after what I did. I'm so sorry.