I ceased to care about the main character about five minutes in. It made it really hard to follow the story. Stuff happened to him; he didn't happen to stuff. That meant the stuff had to be dynamic, and it really wasn't -- okay, there's this chick, and she's cold, and the dude sort of falls in love with her, and she's totally hot, but he doesn't know anything about her. Then she disappears, and comes back, and somewhere in there he has sex with her... and then she kills him.
IMO: good concept, poor execution. Especially the part about the guy's old office finding him a new job -- that would NEVER happen these days.