Call Me — Kristina Knight

This book is a novella.

Katrina Phillips is itchy. The job that has always challenged her seems stifling, her friends are all pairing off and she's been without male companionship for seven long months.
Josh Hanna is paying off a debt: fly to LA, play backup for the house band during the season finale of Star Power and then back to his boring - and sober - life in San Francisco.
But five years hasn't been long enough to douse the flames between them, and its hard to remember why things went so badly in the first place...