Aiden's Angel

Aiden Lobo is a graduate student in a world where magic, gods, and demons are part of everyday life. After a terrible betrayal, he is cursed with a Crack in his heart, turning him into a living doorway for an ancient demon of war to come to Earth and kill millions. Aiden is rescued by his guardian angel, who seals the Crack with his own Light. As a servant of the divine, the nameless angel was supposed to kill Aiden to prevent the growing cataclysm inside him. But he loves Aiden too much to end his life, even to save the world.
Aiden falls for his guardian and names him Eskandar, but then learns to his horror that because Eskandar was created for him, when Aiden dies Eskandar will too. Aiden will do anything to keep his beloved angel safe. But with no choice except to sacrifice himself to prevent the apocalypse, he only has one a terrible betrayal of his own.