Being less than fully literate sounds like the more pressing problem, really, but then, Hermione may be a bit biased on that front.

"Don't you have any friends?" Hermione snaps, only to realize belatedly how that sounds and immediately looking contrite about it. "Sorry, I didn't mean-.... It's just that the time will pass by faster if you have someone you like and trust at your side, willing to help you when you need it. Not to rely on entirely, exactly, but to form a sort of buddy system with."