What's Your Number? (2011) on Netflix

Plot summary

In Boston, Ally Darling loses her marketing job and then her boyfriend, who ends things when she asks him to come to her sister Daisy's wedding. On the subway home she reads a magazine article claiming that women who have had more than twenty lovers have trouble finding a husband. Ally counts her past relationships and lands on nineteen. To keep the number from growing, she decides her next partner will be her husband, and she sets out to track down the ex-boyfriends who might have changed. Her neighbor Colin Shea, who avoids commitment himself, digs up their whereabouts in exchange for using her apartment after his own dates. Among the men she wants to revisit is Jake Adams, her high school sweetheart.