If He Had Been With Me by Laura Nowlin

Autumn and Finn used to be inseparable. But then something changed. Or they changed. Now, they do their best to ignore each other Autumn has her boyfriend. Jamie, and her close-knit group of friends. Finn has become that boy at school. The one everyone wants to be around. That still doesn't stop the way Autumn feels every time she and Finn cross paths, and the growing. Nagging thought that maybe things could have been different. Maybe they should be together. And as time passes, Autumn realtres she might not get another chance to make things right before it's too late.