Scorched - The Burn Series

What happens when you stop loving someone and they start to love you? Unrequited love can be dangerous. During her college years, Penny loved Matthew. She loved him silently and desperately. And she has suffered for it. Matthew was unaware of Penny's feelings for him. He was in a happy relationship with a mysterious young woman named Hannah. In her final year of university, Penny stopped loving Matthew.
And as soon as Penny stops loving him, Matthew declares his love for her. Matthew's love for Penny is obsessive, maniacal and unrelenting. And he decides that he will have her at any cost.