[ If he was a braver man, if there was less of an audience then this is the moment where he'd kiss her. He's sure of it. The moment is right but he isn't, partially because of all the other women he's failed to protect. If she wasn't Leia he wouldn't even be here now, dancing with her.
So, instead of a grand romantic gesture that may or may not have blown up in his face, he makes a little noise and drops the subject. Yes, this is much better. ]