Someone I Used to Know — Paige Toon

In the spirit of Colleen Hoover, a heartbreaking, nostalgic story of three childhood friends, each caught in the crossfire of an all-consuming teenaged love triangle, and their homecoming years later as adults that will reveal everything.

Three best friends. One love triangle. The choice that will change their lives forever.

Then

At sixteen, George is the foster brother Leah never asked for. Beautiful and troubled, he struggles to come to terms with his circumstances even as Leah is drawn ever closer to him. 

Theo's wealthy family have mysteriously pulled him out of boarding school and he's now enrolled with Leah and George. When their worlds collide that summer, George, Leah and Theo form a bond they believe will be unbreakable. But life doesn't always go to plan...

Now

Shocking news brings Leah back home, baby daughter, Emilie, in tow. But Emilie's father Theo isn't with them, and George has unexpectedly returned. After half a lifetime, have Leah and George healed the scars of their pasts? Will coming home set their hearts in a new direction?