Magnolia Parks / written by Jessa Hastings.

Series statement from goodreads.com.

She is a beautiful, affluent, self-involved and mildly neurotic London socialite. He is Britain's most photographed bad-boy lothario who broke her heart. But Magnolia Parks and BJ Ballentine are meant to be, and everyone knows it. They're in the stars ... just suspended in a strange kind of love that looks like hurting each other a lot of the time: She dates other people to keep him at bay; he sleeps with other girls to get back at her for it. But at the end of their every sad endeavour to get over one another, it's still each other they crawl back to. But their dysfunction is catching up with them, pulling at their seams and fraying the world they've built; a world where neither has to ever let the other go completely. As the cracks start to show and secrets begin to surface, Magnolia and BJ are finally forced to face the formidable question they've been avoiding all their lives: how many loves do you really get in a lifetime?