What theme is being expressed in these line "There should be some help, someone should tell them before it was too late. Someone should tell their side of the story, and maybe people would understand then and wouldn't be so quick to judge a boy by the amount of hair oil he wore... And I decide I could tell people, beginning with my English teacher."

Innocence doesn't last forever.
stick with your friends; they are all you have.
It's okay to be an outsider; be your own person.
Don't stereotype someone based on their social class or what they look like.