Accidentally on Purpose by Jill Shalvis

Elle Wheaten’s priorities: friends, career, and kick-ass shoes. Then there’s the muscular wall of stubbornness that’s security expert Archer Hunt—who comes before everything else. No point in telling Mr. Feels-Free Zone that, though. Elle will just see other men until she gets over Archer… which should only take a lifetime… Archer’s wanted the best for Elle ever since he sacrificed his law-enforcement career to save her. But now that she’s earned happiness and success, Archer just wants Elle 24/7.

Their chemistry could start the next San Francisco Earthquake, and Archer doesn’t want to be responsible for the damage. The alternative? Watch her go out with guys who aren’t him… As far as Archer’s concerned, nobody is good enough for Elle. But when he sets out to prove it by sabotaging her dates, she gets mad—and things get hot as hell. Now Archer has a new mission: prove to Elle that her perfect man has been here all along…