Will She Break (Will of the Hearts Series #3) by Alyssa Ray-Bouman:
 
A story about HIDDEN PAIN, HEAVY SECRETS, and the FIGHT to BREAK THROUGH the darkness.

Will She Break is a journey through GRIEF, LOVE, and the BRAVEST BATTLE of all, learning that healing doesn’t mean standing alone, and sometimes the strongest thing you can do is let someone in.

Emma Grayson has spent years trying to prove to everyone, including herself, that she’s enough. After surviving an abusive past, she’s learned to keep her heart guarded. But when an unexpected connection with a friend begins to break through her carefully built walls, Emma is forced to confront a terrifying question. Will she fight to keep those walls in place, or will she break them down for love?

Blake Bolton keeps his pain hidden behind his lopsided smile and funny guy attitude. He doesn’t even let his closest friends see the truth. With the fear of what his future may hold and his anger starting to boil over, the last thing he expects is to fall for his friend, the sweet one with kind eyes and her own buried scars. Falling for her feels like the one part of Blake’s life that makes sense, but will he risk loving another person he’s terrified to lose?