Goodbye Stranger by Rebecca Stead
Long ago, best friends Bridge, Emily, and Tab made a pact: no fighting. But it’s the start of seventh grade, and everything is changing. Emily’s new curves are attracting attention, and Tab is suddenly a member of the Human Rights Club. And then there’s Bridge. She’s started wearing cat ears and is the only one who’s not still tempted to draw funny cartoons.
It’s also the beginning of seventh grade for Sherm Russo. He wonders: what does it mean to fall for a girl–as a friend? By the time Valentine’s Day approaches, the girls have begun to question the bonds–and the limits–of friendship. Can they grow up without growing apart?