There have been many metas written on the famous tarmac scene, analysing all of the implications the one line presents. Sherlock is actually a girl’s name. It has become a famed unspoken love declaration, I suppose there are no doubts about that. However, in this meta I would like to elaborate on what particularly this one sentence means, taking into account everything that has happened, Sherlock’s and John’s body language during the scene and the parallel scene in “A Scandal in Belgravia.”
Warning: If you don’t ship johnlock, you will probably want to stop reading now.
john: sherlock i’m mad at u forever i just came by to tell u that
sherlock: i’m investigating a terrorist cell and also my shirts are still tight
john: i’m in too deep