Considering Harry had to be under the influence of a literal truth potion to mention that he had anything other than friendly bro feelings for Corbin, he figures it's best not to focus too much on Harry's words when he's his usual self. Harry is like Caleb in a way. He says he cares on hundreds of other ways that have nothing to do with saying a specific set of words.

"Guess I'll just be the sappy one then." He smiles, he doesn't mind, though he wishes he could press closer, but if he did that he'd be in Harry's lap. He had missed just having someone to have close contact with after Caleb had disappeared, and he's aching for it now. And as the wind blows over the roof and moans past their little hidey hole he's kicking himself for not reaching out to Harry sooner. He should have. But there's nothing he can do about it now other than cuddle close wit him and make up for lost time.