My Mistake

Celia Raine is the type of girl that when people think of her they think ....."Is she OK?", "What wrong with her?", "God, she's so embarrassing". She's a nerdy-athletic girl with a messed up family. She struggles to fit in but is friends with some of the "popular" girls.
On the first day of 9th grade, she runs into this greek-god like-boy and spills her coffee on him. She did the stupidest after, she slipped on the drink and fell straight onto him. When she looks at him she sees the most beautiful eyes, and stares into his eyes until he says "Take a picture, it will last longer".
Her friends start laughing while she glares at him as if he was satan. "I don't make fun of the less fortunate she says. He looks at her irritated before leaning up and whispering in her ear, "I love fiesty girls with a big mouth, but if you know what's best for you, I suggest you keep your mouth closed before it gets you in trouble".
She jumps off before running down the stairs to her first class.
What will happen when she sees him in her class?