(Sora loves you so much for giving attention to his doggies.)
He felt kind of bad for leaving Riku alone almost all day, when he said it wouldn't be all day. He wanted to sneak off, but he wasn't sure if he wanted to be alone anymore. All he really knew is that he wanted to continue whining and crying and being depressed.
"I'm going upstairs," he replied as clearly as he could manage (kind of fail), pushing his shoes off. You can follow me if you want.