Saints of Augustine by P. E. Ryan

Sam and Charlie used to be best friends. But then Sam cut Charlie out of his life—no explanation, no discussion, nothing.

Fast-forward one year, and both Sam's and Charlie's lives are spiraling out of control. Sam has a secret he's finding harder and harder to hide, and Charlie is dealing with an increasingly absent dad and a dealer whose threats are anything but empty. Now, during the sticky Florida summer before their senior year, the ex-best friends are thrown together once again when they have no one else to turn to.

A year had passed like smoke in a breeze. Suddenly, later was now.