I know there are a lot of those out there, but the specific one i am looking for has Spike as a vamp, and Buffy is a reg human, no slayer powers, nothing. Anyway, Spike goes to a club/bar, and sees Buffy. He starts off knowing that he's going to take her home and kill her. Buffy unaware goes home with him. Spike has sex with her, decides not to kill her and begins a relationship with her, not telling her what he is.
Buffy's ex is Riley, who's clingy and wants her back and takes to stalking her, and sees her with Spike. He then figures out Spike is a vamp and tries to warn Buffy. Buffy realizes he's right by piecing together odd occurances about Spike ( the weird hickeys, not going out during the day, unusually strong) and even knowing what he is she still decides to see him, which ticks Riley off. Now this part I am not sure is part of the story or wishful thinking on my part, but Spike kills Riley when Riley attacks him. I also think by the end of it, Buffy asks Spike to turn her and he does, although those 2 facts I'm not 100% sure about.
Other info: Spike lives in a warehouse, and Buffy is a corporate girl, so no Doublemeat Palace job for her. I also think Anya is in it, cause I keep recalling a scene where Buffy talks to Anya and Anya either knows about vamps being real or makes a reference to Spike being one because of the hickeys.
TIA | 
