Secret Identity. Secret Series, #4

Two best friends, one chance at loveEve is at the top of her game. She's finally going to make partner at the ad agency run by two of her best friends. But when she takes a business trip to wine and dine a potential customer, her boss decides to tag along at the last minute. Now everything she's worked hard for might just disappear in a flash. Carter has had a thing for his best friend Eve ever since he can remember.
He hired her a few years ago to help boost his business and it has never run more smoothly. But when a once-in-a-lifetime opportunity presents itself, he takes a chance at happiness that could end up destroying their friendship.