Re: Why did Kirk tell Gaila "That's weird"?
When Gaila calls for the lights and asks if Kirk doesn't love her, too, Kirk sits back and says, "No, I meant..." -- correcting her, as though he was meaning something else completely. Then Uhura interrupts them.
He's not talking about what she said.
He's looking for a way out of the foot-in-mouth situation he's landed himself in.
If we don't get off this planet we'll all die here.