There are some things the Eleventh Doctor just can't figure out. Number One is why River keeps shooting hats off his head. Second is why Rory and Amy don't like their bunkbed. Third, how he feels about Rose Tyler.
Number one is important because he wants to keep his head (and more importantly, the next fez he finds) intact. Number two is important because he doesn't know why he has to keep reassembling the bed. Number three is important because…well, to be honest, he isn't always sure if it's important or not.
She still has him (him, not him), after all. They can go off and make babies to their hearts' content. He briefly wonders if that disgusts him-not-him as much at it disgusted him when he was the ninth one. Or when Amy backed him up against the TARDIS. Ewww. Just…ew.
What was he thinking about again? Right, Rose. He just doesn't think about her that much. Parallel universes and all that, not like he could pop in for a quick visit. Besides, he has other things to worry about. Like those Daleks that got away a few months ago, and where to find a fez, and what it is Amy wants to tell him.
Author's Note
I try to avoid AN's if possible, but I have a feeling I'll get run over by both sides of the road here, so I better make my position clear. 10.5/Rose are together as far as 11 knows (and if they aren't, it's not because Handy's a jerk). I honestly can't see 11 and Rose together at all—she had enough trouble when 9 regenerated into 10, and 11's such an overgrown child anyway…he still misses her, but just about as much as any other former companion.