The Vampire Lord Went Mad After I Vanished

One night with him. The next morning, the vampire lord introduces me to his fiancée. "This is Elena," he said with a smile. "The most valuable asset of the Deverills." Not his lover. Just useful. Ten years. I bled myself dry pulling him back from the brink. Naively believing I meant something to him. Then I discovered something far worse than betrayal: In every future he had planned—I was never part of it. So I stopped fighting for a place beside him. And for the first time, the untouchable vampire lord must face one brutal question— After losing the woman who saved him from the abyss more times than he can count... how does he even survive?