If Sherlock had been able, his habit of living alone would have continued. He greatly preferred the simplicity of not sharing a space with someone else, of never having to answer or account for another. After his last forced living situation, still fresh in his mind and still very much uncomfortable to remember, he did not want to have to subject himself to that again. The move, however, had been quite expensive, what with the bulk of the items he took with him rather large and the secrecy and haste with which he wanted to escape his family's grasp made it more so. Be that as it may, he wondered if perhaps sharing a space with John would not be the hassle he anticipated it to be.
Both impatient and not interested in wasting time sitting idly, Sherlock had taken his mobile from his pocket, checking through missed messages. All requests regarding the flat were met with quick, unceremonious replies stating there was no longer an opening, and any inquiries from his brother were still met with silence. There was one solitary email from the laboratory, someone asking for his assistance if he could spare the time.
It seemed as if John was done with his inspection of the rooms and Sherlock once again tucked the phone away.
"To answer your earlier inquiry: You are the first person to have actually entered the flat." Sherlock let that be his answer to John's question. He assumed the man was smart enough to piece together what that meant. Standing up and smoothing out his dress shirt, Sherlock moved towards John, snatching up his suit jacket and shrugging it on. "Now, follow me. I'll take you to the landlord to sign the lease."
Sherlock was aware how forward that seemed, but based on the man's continued endurance of everything he has been put through thus far, the fact he came back to the living room instead of simply showing himself out lead Sherlock to believe John had already made a choice about whether or not he would stay.