All I Need is You by Cassie Cross

Alexa Jameson is a woman with a clumsy streak, who is working overtime to get her party planning business off the ground. On her way to a make-or-break meeting, fate deals her a cruel blow:
She has to make nice with Jesse Scott—a guy who rejected her in the most embarrassing way possible—or the whole project goes up in flames.

Jesse seems like a completely different person than the one Alexa fell for, but the more they work together, the more she sees traces of the man she remembers. He goes out of his way to help her, he opens up to her, he lingers when they touch.
Midway through their project, Alexa realizes that he lied when he said he didn’t have feelings for her. The only thing she can’t figure out is…why?