Short, inspired and wrote this. I have no beta so all mistakes are mine.
Dan was gathering old scraps of paper from his old desk. Moving out is always a heavy burden and this is not an exception. It came at a good time really. Leaving the loft, getting a place of his own, starting all over. While he was examining a thing or two he had written in a haze and completely forgotten in the corner of a drawer, he notices a kind of paper he didn't usually bought. It was pastel pink. "Definitely not mine". Moved by curiosity, he opened it to read it and what was his surprise when he saw Blair's handwriting:
I am not a writer, and I will never be. But you inspire in me words I never thought I could say to another human being. You inspire in me worlds where I want us to live in. And is not me being romantic and is not me drinking too much wine. It is just me trying to tell you how much I care for you, love you even. At this exact moment I feel content.
Thank you for being here for me.
Always, Blair.
P.S. I wonder how long it will take you to find this. Hopefully long enough for me to have the courage to confess this in person.
It was difficult to describe exactly what he felt at this moment. It was a mixture of sorrow, regret, happiness and most importantly, the mourning of a lost love. He didn't think Blair Waldorf had it in her, after all this time, to make him feel like a lost child. If only things had turned out differently… In this instant he was reminiscent of all the things they did together, all the experiences they discovered together. He felt a sudden rush of emotions that intensified what he was already feeling and he suddenly started to cry. He didn't understand why. He didn't even loved Blair, anymore. He liked Serena, loved Serena. He was marrying her for God's sake! He was a writer. Yes, unlike Blair, he was a writer and as one he was bound to be a sentimental person. That was it, the writer in him compelled him to cry, maybe he cried because of how beautifully written for a non-writer this letter (Could he call it letter? A note, perhaps) was. This thought make Dan recover from this unexpected, whatever this was. Just like that, the moment was gone.
Life moved on, and so did Dan. Or at least he tried the best he could. Every time he thought he was completely happy and in the moment, something set him back. He didn't know what it was. Well, he probably knew but he didn't want to give it much thought. But sometimes, at night, when Serena was long asleep and he was in the verge of following after her, when he was in the strange place where consciousness and unconsciousness mix together, he remembered the piece of paper he found that summer afternoon while he said goodbye to his old loft, his old life. He lingered on the thought that scared him while in his senses: Blair Waldorf had loved him as much as he loved her, as much as he still loves her. Knowing that Blair Waldorf once loved him was enough for Dan to never really truly letting go of her.