Kiss Collector by Wendy Higgins

When seventeen-year-old Zae Monroe gets cheated on by the only guy she’s ever loved, then watches her parents’ marriage crumble, she decides to forget about relationships and turn the tables on the boys of the world. It’s time to take what she wants, and what she wants are kisses. Athletes, musicians, poets, and bad boys—their lips are all on her agenda, and it’s time to collect.

Zae proposes a contest with her friends to see who can kiss the most boys during spring break. But what starts as a harmless competition leads to a downward spiral she can’t seem to break free of. As family, academic, friend, and guy drama come to a head, Zae is forced to face the reasons behind her boy angst, and starts to wonder if she was wrong about the male race…or at least some of them.