Sex and the Single Vamp by Robin Covington
Cici Trent, vampire and media darling, spends her days finding true love for humans and supernaturals (the "Others") at her dating agency. But someone is trying to sabotage her business and she needs help. Unfortunately, the best man for the job is the one who broke her still-beating heart two hundred fifty-four years ago.
?Deacon is a patient vampire. He's only loved one woman in over three hundred years- CiCi- and she chose another. So when she shows up in his office asking for help, he finally has the chance to lay that demon to rest. He'll help her, but for a price-a night in his bed.
?Adrenaline, mischief, and a little late-night B&E light the passion that even a couple of lifetimes couldn't put out. But Deacon has a secret and when Cici is suddenly mortal, his deception might be the only way restore her immortality. Can love bridge the gap between a heartbeat and forever?