Its In The Stars by Liz Levoy

Anna is an independent woman who can’t find a partner in any of the men she meets. Leo is self-destructive and desperate to run away from his path. When the two meet, sparks fly but neither of them know what to do with it. In the meantime, life goes on and they choose their paths. When they spend more time together they start to wonder if they shouldn’t be together after all. Until Leo’s past interferes and Anna decides to take a job offer that will take her away from him. Will the two of them realize they were meant to be? Or will they choose lives without each other?