See You Monday by Tiffany Costa

Celeste McAlaster woke up a bride and went to bed in ruins. Grappling with her new reality, and the person she thought she was, Celeste decides to pack up her life and run away.
Two weeks, and one desperate plea for a transfer later, Celeste finds friendship in the arms of her new roommate. And comfort in throwing herself completely into her new career.
Isaac Thompson, her new co-author, finds nothing but discomfort with Celeste’s presence. She’s too neat, too efficient, too invasive. . . too tempting. She also wants nothing to do with him.
As her heart begins to heal, Celeste learns that sometimes running away is really just running towards yourself.