Sherlock realises his true feelings for John when he moves away with Mary. Sherlock doesn't know how to handle it. Is it too late for them? Johnlock. Inspired by the song 'Dear John' by Taylor Swift.

He was obviously untrained. Not an assassin or a mastermind criminal, so why could Sherlock not stop him? He should have seen it coming. He was nothing more than a thug and was no match for Sherlock's brilliant mind, but now his world has collapsed, he has been beaten. For once in his life Sherlock Holmes agrees with something his brother said, caring is a disadvantage.