Draco tried not to grin like an idiot. Though he felt purely elated. Hermione desired him. She wanted him as a boyfriend, or at least a friend. She enjoyed him, was proud of being seen with him, and he felt like Ron hadn't ever been like that. From his memory her and Ron weren't a good couple, it was almost assumed they were one. But Ron, Draco would guess, didn't believe he deserved her. Thus being seen with her, being with her explicitly, was not on the top of his mind. Instead likely he would, if he was here, be trying to constantly prove himself. Thus Hermione would fall to the wayside as Ron didn't seem confident. Draco while he could very well slunk around the castle like a whipped thing, was proud he was with her. That she forgave him. That she wanted him, desired him. And LIKED it when he was with her in public. Showing people that she was his, and to a part, he was hers. 