Au Revoir

Five hundred years ago, Clarissa Fray was cursed by a witch. She could live forever, but she couldn't be with the person she loved, Jace Herondale after he was twenty-one. If she stayed with him, he would die and wouldn't be reincarnated ever again. Instead of ending up breaking his heart by leaving him, she chose to be a stranger who made sure he ended up with the right girl.