Why Should Anything Matter?

This is your typical story about an average teen. Or is it?

Gray Roberts. Straight A student. Valedictorian. Role model.
Lonely. Depressed. Sad. Angry. Orphan.
Gray Roberts is an normal student. She's got one friend at school she barely sees and a friend at the park she goes to all the time.
Her life is normal until one day when she is asked to the principles office. She is in for a huge surprise. She doesn't know what understand what she's feeling. She doesn't know what she's in for. She doesn't know why it matters.
All she knows is:
"Why should anything matter?"

Warning: don't read if you can't handle stuff like strong language and depression stuff