Johnlock
Ever since Sherlock had met John he knew he was different. Sherlock had always promised himself that he would only focus on the work but then John Watson had to come along and ruin it all with his funny jumpers and his obsession with Jam. Sherlock imagined John tasting like jam and tea but he would never know because as John kept saying he was not gay and besides why would he take an interest in Sherlock even if he was.
John kept denying it and saying that it wouldn't work and they were just colleagues but that didn't stop him imagining all the naughty things they could get up too. He was worried that the detective knew this by seeing the lust filled looks he gave him but Sherlock never bought it up so John assumed that it didn't bother him or he just didn't notice but John doubted that he hadn't noticed. Even Lestrade had noticed and Mycroft had told him to back off a couple of times.
Sherlock never noticed Johns lust filled looks he was too busy looking lustfully at John and then quickly looking away because he was ashamed to feel this way. Whenever they were working cases Sherlock had to be careful not to look at John in case Lestrade saw but that didn't stop him taking some sneaky peeks to the side. Molly had noticed though, Molly had always been very observant of Sherlock and of course Sherlock knew exactly why. "You look sad when you think he can't see you." Those had been her words but she didn't push it she just simply knew.
John was wondering why Sherlock had not come with him when they learned that Mrs. Hudson had been shot but when he got to 221b he understood. She had not been shot and Sherlock knew it. They just needed John out of the way. John ran out of the house leaving a very confused Mrs. Hudson behind him and rushed back to st. Barts hospital when he got a phone call.
Sherlock looked down at John from the roof of the hospital and thought about all the unsaid things but he couldn't say them. He reached out longing to touch him one last time then said goodbye.