The Romantic Agenda by Claire Kann
Thirty, flirty, and asexual Joy is secretly in love with her best friend Malcolm, but she’s never been brave enough to say so. When he unexpectedly announces that he's met the love of his life—and no, it's not Joy—she's heartbroken. Malcolm invites her on a weekend getaway, and Joy decides it’s her last chance to show him exactly what he’s overlooking. But maybe Joy is the one missing something…or someone…and his name is Fox.
Fox sees a kindred spirit in Joy—and decides to help her. He proposes they pretend to fall for each other on the weekend trip to make Malcolm jealous. But spending time with Fox shows Joy what it’s like to not be the third wheel, and there’s no mistaking the way he makes her feel. Could Fox be the romantic partner she’s always deserved?