Six Scorched Rose by Carissa Broadbent

Six roses. Six vials of blood. Six visits to a vampire who could be her salvation… or her damnation.

Lilith has been dying since the day she was born. But while she long ago came to terms with her own imminent death, the deaths of everyone she loves is an entirely different matter. As her town slowly withers in the clutches of a mysterious god-cursed illness, she takes matters into her own hands.
Desperate to find a cure, Lilith strikes a bargain with the only thing the gods hate even more than her village: a vampire, Vale. She offers him six roses in exchange for six vials of vampire blood—the one hope for her town’s salvation.
But when what begins as a simple transaction gradually becomes something more, Lilith is faced with a terrifying realization: It’s dangerous to wander into the clutches of a vampire… and in a place already suffering a god’s wrath, more dangerous still to fall in love with one.