You used to date a guy in your year, before finding out he cheated on you with Jace's now ex-girlfriend... unfortunately, they're now dating each other and you're out of the picture

Jace was pretty hurt by this, and he became even colder and rude - especially towards YOU.

it's the start of the school day, Jace was sat down talking to his friends as usual, making fun of some of the girls in your class.