Wanting to see what else there was, Sherlock pulled up another article. After reading the first paragraph he stopped, not needing to go any further. If a friend was the first person you wanted to tell things too, who remembered what you liked and didn't like, and enjoyed accompanying you to things even if they were boring, then John was definitely his friend.

John was always the first person he wanted to tell things to, whether it was results of an experiment or when he'd solved a case. Looking for John was sometimes even the first thing he seemed to do whenever he got back to the flat after being out by himself…depending on what he had been doing. John definitely knew what he liked and didn't like; he hated being bored, liked sugar in his tea, and hated shopping. And John definitely enjoyed accompanying him whenever he went out for a case; there was no doubt about that.

Based on everything he'd read, and all his deductions, John and he were definitely friends. He knew he was right. Sherlock couldn't help but smile at actually getting confirmation on it. He actually had a friend; something any normal person would have. And for the first time that he could remember, he actually didn't mind being normal.