Whatta Man by Chelsea Davidson

Jessa Meyers never let herself think about forever before her heart transplant. When you don’t think you’ll have a future, it’s too painful to plan for one. But now that the stunning, blue-eyed beauty isn’t “the sick girl” anymore, she’s determined to dream big and make those dreams come true.
Only one problem: every time she tries to dream up her “forever,” all she can seem to think about is Ethan Steele.
Ethan Steele knows that loving Jessa is probably a losing proposition. She’s made it clear again and again over the years that she doesn’t want his attention.
Only one problem: that’s not what her eyes say each and every time they meet his.
The handsome, brooding U.S. Marshal knows that a plan is the clearest path to success, and he has one: convince her to be his fake girlfriend for the summer.