Hybrid’s Curse by Leigh Kelsey

As a vampire-witch hybrid who can never be killed, Emilio is used to pain and suffering. But when Aislin, an innocent faerie healer, is kidnapped because of him, Emilio will do anything to stop her suffering too. Especially because she’s been dreaming of him for seven years, and claims to be his mate.
But the vampire who has taken her wants the God’s Chain—a weapon capable of flaying a vampire to the bone—and unless Emilio brings it to him before midnight, Aislin will die.