It Ends with Us - Colleen Hoover

Lily hasn't always had it easy, but that's never stopped her from working hard for the life she wants. She's come a long way from the small town where she grew up—she graduated from college, moved to Boston, and started her own business. And when she feels a spark with a gorgeous neurosurgeon named Ryle Kincaid, everything in Lily's life seems too good to be true. Ryle is assertive, stubborn, maybe even a little arrogant. He's also sensitive, brilliant, and has a total soft spot for Lily. And the way he looks in scrubs certainly doesn't hurt. Lily can't get him out of her head. But Ryle's complete aversion to relationships is disturbing.