Sherlock makes his decision now, too.
Meeting Halfway
It happened the day after that, and the day after that, and the week after that, too.
Sherlock would sit down in his seat, and John was there with a warm cup of tea and the white chocolate biscuits.
Sherlock, for the little social tact he had, knew what this was: this was an admission of acceptance (a small one, at least). This was a truce. This was trying to meet someone halfway.
On the ninth day of this occurrence, he was sipping from a lavender teacup, watching John make hot chocolate. When he finished his tea, he approached him.
Prompt was #11: lavender