Hey! Riku and Sora got out of the house plenty. AND they had fun too.
With nothing really better to do, Riku watched Sora leave the room and then gathered up his bowl and its soggy contents to take to the kitchen. He didn't want to detour back by the door and see Kairi again. He wondered if she harbored any dislike of HIM, for unintentionally taking Sora away from her.
He supposed they both had one thing in common... they wanted what was best for Sora. They just sometimes tended to have different ideas of what made him the most happy.