The Girl with the Life-At-Home Secret. (Book 1.)

Ariana Grace to most people was your typical smiling, smart, well behaved student. Each day, she plays it out with a fake smile, which everyone assumes everything's going great for her. But that's what everyone thinks, not what actually knows.
Her life at home? It's a secret to most. When a new students come to Eastford High, Ariana begins to make friends with them. But it all just ends when a question that she refuses to answer to anyone. "So, aside from school, what's it like at home?" She refuses to answer it, which makes the person annoyed and start to find Ariana weird. So like most of the people in the school, they ditch her.
But, what happens when the one and only famous One Direction come to Eastford High for awhile to get some education before theirf tour starts up again? Will Ariana open up to them? Can they save Ariana?

But the real question is;

What is the secret of The Girl with the Life-At-Home Secret?