Perhaps now is more important than a rollcall of all the other people he's loved in the past. Each of them ended in its own way, and in the end that's what it comes down to. Each love has its time, and then it's gone. All he can do is make the most of the time he has with each of them.
He shakes his head. "Not at that point, no. No undercover missions to kill aliens behind the Nazi menace or anything. Just me trying to be the best I could be, in the Doctor's memory."