You Brought the Stars Back to Me

"This piece of paper with these words that have taken up so much space in my mind over the past few years with you will live forever in my desk drawer, never to see your eyes. But I must say this because if I don't, I'll never be able to get anything done with it clogging my brain.
I love you, John Watson."
Sherlock writes a letter to John, one that was never meant to be found.