John walked into his room thoroughly exhausted. Work had been dreadful that day and he was relieved that he and Sherlock didn't have a case at the time. I would not have been any help whatsoever and would have probably been annoying as Anderson is...all right, not that annoying.
John had even been a little relieved to see that Sherlock had not been "patiently" awaiting his return from work in the living room. The way his day had been going, John would have held little to zero patience towards Sherlock and his little quirks. The last time he had little patience for him, they had ended up having a fight. Even though making up with each other had been fun, John always hated fighting with Sherlock. Well, fighting when its repercussions were longer lasting.
Barely managing to take off his coat, John tossed it onto the floor. He managed to collapse on the bed when the door creaked open.
"Jaaaaawn?"
Sighing, John turned to look at the figure in the doorway. "Yes, Sherlock?" John tried to hide his slight annoyance with his flatmate, but Sherlock obviously caught on.
"I'm sorry, John," Sherlock said sleepily. "But I can't fall asleep right now." Sherlock paused for a moment to yawn and John took advantage to notice Sherlock was wrapped in a blanket and hid his laughter. "And I know how important my...sleep is to you, but sleeping alone is not working right now."
Before John had noticed, Sherlock was laying in his bed with him. "Sherlock, why can't you sleep in your own room?"
Sherlock weaseled his way into John's embrace and kissed him lightly, first on his cheeks then his lips. "I missed you, John."
A few moments later, the world's only consulting detective was sleeping safe and sound in his blogger's arms. John kissed his forehead and whispered, "I missed you too, Sherlock."