Don't believe what they tell you in movies and on TV; ghosts don't haunt people. Don't get me wrong, I'm not saying there's no such thing as ghosts, I'm just saying they don't haunt living people – because basically they don't know we're here. 
How do I know that? Because I can see them. I have since I was a little kid. But I didn't have a grandmother who taught me how to help people move on, or Bruce Willis as my ghost shrink. Nope, I just got to stand around like a zombie staring at people nobody else could see, wondering if it was me or the rest of the world who was crazy.
Then, just when I'd worked out what my version of 'normal' was, and was content with it, Jake came along - the anomaly - the Grey who didn't play by the rules. What was worse, he couldn't be just any old Grey, could he? Oh no, he had to be the most gorgeous guy I'd ever laid eyes on, living or dead. And he was set on rocking my world, whether I liked it or not.