100 Miles Sideways by Andrew Smith

Finn Easton sees the world through miles instead of minutes. It’s how he makes sense of the world, and how he tries to convince himself that he’s a real boy and not just a character in his father’s bestselling cult-classic book. Finn has two things going for him: his best friend, the possibly-insane-but-definitely-excellent Cade Hernandez, and Julia Bishop, the first girl he’s ever loved.