He's seeing what he wants to see, maybe, but all he truly knows is a boy his age shouldn't be out alone in the woods. Not the way things have gotten recently.
"Right," he says dully, unconvinced. Though he reads fear, he knows what boys look like when they're up to no good. It reads as fear of being caught more than anything, and that's worrisome to a man like him. After a beat, he asks: "Can I walk you home?" That might seem like a stranger-danger thing in any other place, but Tony wouldn't know about that. He only knows he wants Ciel out and away from the forest as quickly as possible. So he can hunt whatever is in here with them.