It's Complicated(2016)

Shauna has been having casual sex with her handsome friend Will, biding her time until she can finally make a move on her long time crush Brandon. A wedding invite provides the perfect opportunity and she convinces her best friend Carrie to go with her. Things get complicated when Carrie inadvertently hits it off with Brandon and an old buddy confesses his love for Shauna. Shauna realizes her feelings for Will run much deeper than she thought.