He's such a fucking spaz, man. I feel like the idea here is that we're supposed to find it cute how low her expectations are and how he helps her start living a normal life, and that his awkwardness is supposed to be a source of humor as well as help equally awkward readers relate to him. But, the thing is, at this level, he's just super egocentric, always putting his own perceived humiliation above everything else. He can't just let her enjoy a new experience in peace, and instead he's so fucking freaked out at being in a public location and being seen by other people that he has to throw a huge tantrum and drag her out of there. That's not cute, funny or relatable, it's just being a douchebag.