He nods and offers a little smirk. Because he does that in this body.

"But neither of us are there, we're both here... so what do we do with ourselves now?"

His voice is still a bit forlorn, because until he has either his Time Sense back or his TARDIS, he is about as lost as he's ever been in his life. While River knowing him is a small comfort, he really wishes she didn't know this part of him.