R suggested that perhaps I ought to start introducing him as "my boyfriend" rather than some nondescript person I just bumped into. The conversation sent me into a complete "Wohoo, there's my bus - gotta run!" state.
Ironically, I have actually referred to him as "my boyfriend" a number of times when he's not been around. Now that we are officially adding labels, however, I can't help but feel that I'm sitting in a moving roller-coaster not entirely sure if I like speed.
Time will tell.