Yeah, I'm worried too. All I can do is believe in him and follow after him if he ever gets lost. Those times when he was the one looking for us, he never stopped moving. Kept going in the hope of getting a clue.

[ It's what he can do for the sacrifices Sora has made, to return his friend's faith. Riku was the one who let Sora go after Kairi, he knows the strength in the brunette's heart and that he wanted to do it alone. The reasons behind it. So all he could do was wait. ]