He does feel bad for upsetting Ven. He didn't want to do that. But he won't lie to him. It wouldn't do either of them any good.

"Regardless of if it was him or not, he's gone now." He's no good at comforting people. It's just simply not a talent he possesses. He doesn't try, because he feels he'd just make things worse. So instead he lets it drop.

"The complex has many rooms available." A pause. Ventus is all alone here and just found out that people he cared about might have died... "If you don't mind children or sleeping on the couch you're welcome to stay with my family until you've settled in here."

He respects Ven. He even feels somewhat indebted to him for that day when he was just a child and Ven saved him. He should pay him back if he can.