Kaoru wanted to run and hide. Not even the mention of a 'boyfriend' could brighten his mood.

"Tamaki.... if you can't smile, how is anyone else supposed to?"
He wanted to suggest that Tamaki stopped helping injured people, but he knew it wouldn't work. Tamaki had to help people and now he'd lost his spark, he needed a new way doing so beyond trying to make people feel loved and wanted.

"Come on. It's Kyouya, he can't be beaten. He's out there finding a way to get us out. And...Haruhi went missing before....she was fine when she came back, right? If they were.... well, someone would know. Like that other guy last night. Wouldn't they?" he reasoned. "So....wherever they are and however long they're there....they'll be ok."
Kaoru could feel his sulky cloud begin to lift a little. He wasn't happy, but he was determined.
"And we'll be ok too. Just like you said, we'll check in with each other every morning. We'll... we'll find something to do every day. To keep busy and help people and find our way out. Tamaki. We an do this...we....just need you to lead. Right?" he said, glancing towards his brother, finally making eye contact. A silent apology passed between the two boys.