Ted is absolutely correct that Sherlock's priority is his partnership with Watson, and always will be.

"I at one time considered London to be my passion," he says, setting down his silverware on his empty plate. "And New York to be a place of exile. However, things have since changed, quite significantly. The people who are important in my life are, for the most part, in New York. London remains as fascinating a city as ever, but there is something missing."