Near Dark (1987)
Pray for daylight!
A young cowboy is seduced by a new girl in town only to find out he has been kissed by a vampire. Slowly turning into a creature of the night, he is persuaded to join up with the girl and a roaming band of ghouls. But when his own father and sister become targets in the vampires' endless search for 'food,' he is forced to choose between loyalty to the vampires, or loyalty to his own family.