In Blood and Worth Loving — Marilyn Lee

With his favorite lover traveling, vampire Jayvyn Redwolfe spends a night clubbing. A “chance” meeting with a human woman intrigues him. When he learns she's struggling to recapture her ex's attention, he agrees to pretend to be her new love interest. Things go awry when Jayvyn realizes he's falling into blood with another man's woman.
Charmed by Jayvyn's attentiveness, Cayenne Pepper's interest in reuniting with her ex wanes as she starts to fall for Jayvyn. She's unaware that she's arousing the passion of a vampire whose hunger for her blood and heart is rapidly nearing the point where he'll do whatever is necessary to possess her -- including killing her ex.