When her parents announce their impending divorce, Natalie can’t understand why no one is fighting, or at least mildly upset. Then Zach and Lucy, her two best friends, hook up, leaving her feeling slightly miffed and decidedly awkward. She’d always imagined she would end up with Zach one day―in the version of her life that played out like a TV show, with just the right amount of banter, pining, and meaningful looks. Now everything has changed, and nothing is quite making sense. And then, an unexpected romance with Zach’s older brother comes along and shakes things up even further...
summary from amazon.com