Unmagical Boy Story — Tansy Rayner Roberts

Viola Vale, Jules Nightshade & Ferdinand Chauvelin had everything: wealth, family legacy, powerful magic and high status at Belladonna University's College of the Real. But when Chauv lost his magic in an accident at school, he slipped away from their life, finding new friends on the other side of campus.

Viola thinks Jules is crazy: one night partying with Chauv's geeky, tragically insignificant friends (who calls a band Fake Geek Girl? What does that even mean?) is not going to make a difference to their lives. 

Viola has never been more wrong.