A Life Lived Ridiculously by Annabelle R. Charbit

When a girl with obsessive compulsive disorder falls in love with a sociopath, she must fight for her sanity and her life.
 
Maxine's brain is stuck. Everything around her feels wrong and the only way to fix it is to check, double-check, rearrange and count everything. What Maxine can't fix though is her parents' constant nagging over the absence of a husband. A humiliation that is further compounded when her younger brother runs off with Miss Perfect. Then she meets Sam, a smooth-talking charmer with the weight of the world on his shoulders, and enough terminal diseases to wipe out a small village. Maxine decides that Sam is her salvation, never mind that his life is more depressing than a Greek tragedy, and others are urging her to get away from him. The problem is that Sam has Maxine under his spell. Will Maxine escape from Sam before it is too late?