I'll Give You the Sun by Jandy Nelson

Jude and Noah can't be any more different, even for twins. Thirteen and isolated, Noah is falling in love with the literal boy next door and painting pictures in his head; Jude is reckless, wild and uncontrollable, wearing lipstick too red and skirts too short. But they always had each other. Three years later, something has torn apart Jude and Noah and they can barely be in the same room, miles and miles of distance between the twins. If only they knew they're on a one-way collision course, watered down in paint and stone, and they had a story to finish together.