The girl gets hit on by random guys is a standard Japanese tripe. It happens in every romance manga.This is hilarious and sad at the same time... What is the mindset to write guys this way? They essentially harassed her and she told them off, why would they think she can't be all fluffy to a guy she actually knows and likes, and why would they put her bf in some kind of pedestal just because he's acting like a human being to someone he knows?
A regular looking not amazingly handsome guy is able to not only easily talk to but obviously fluster a smoking hottie just by talking to her. That deserves respect. Dude had the balls to approach a girl out of his league in the looks department and she is head over heels for him.