Colin by Grae Bryan

Colin has spent his whole life waiting for something. He doesn’t know exactly what it is, or how to find it—all he knows is that he wants more. When the existence of vampires gives him hope for exactly that, he’s determined to find one for himself. And when he finds out Tucson holds two vampires without mates of their own, he’s willing to do whatever he can to get close.
Fox has spent his whole life looking out for his brother. So when his twin shows signs of bone-deep boredom and ambivalence, who can blame him for wanting to grab on to anything that could bring him back to himself? And if that something happens to be the pushy, prickly blue-haired human on their doorstep—asking to stay, demanding to be fed on—then so be it.
Dane has spent his whole life feeling different. Even as a vampire, he doesn’t quite fit the mold—too attached to his brother, for one, with a platonic, fated bond that can’t be broken. So when a strange human comes into their lives and seems to accept them exactly as they are, who can blame him for starting to hope, just a little, for something… more?