Birds just don't show their feelings the same ways that humans do. Even birds who happen to look perfectly human. He also has a lot of practice keeping people from knowing what he's really thinking. It helps to keep people at a distance, where he wants them. Until Vincent. VIncent, he wants to get closer to. Vincent, he doesn't really want to keep at arm's length like he does with the rest of humanity.

Not that that means he intends to give up on his talent for being able to hide things like nervous energy. Oh no, that is a very handy skill, being able to make people think he has his shit together more than he really does.

"I want you~" he chirps as he enters Vincent's dorm, stepping out of his shoes and closing the door behind himself. "But I'll take some water."