Crimson Echo

From Amazon: When you play with fire you’re bound to get burned, but sixteen-year-old Tristan Young must fight fire with fire if she expects to survive in a town infested with witches and their enemies.
Sheltered but mouthy teen Tristan of small town Echo Oregon can’t remember the horrific incident that nearly took her life only two short weeks ago. Private school dreamboat Kane Evans can help her regain her memory while stealing her heart, but he’s hiding his own dark secret. A fire-wielding witch, he may have sparked the very incident that changed her life forever. Eager in her quest to know the truth about that ill-fated day and reluctant to get over the loss of her best friend, whose death was meant as a warning to the Evan’s family, it only draws her closer to Kane and ultimately closer to the answers that she seeks. She’s given only one rule after discovering Kane’s true identity: don’t tell a soul. But can she keep his secret?