It's a very good start to a story, different, not based on the popular pretty cheerleader, or the dark and moody odd-ball but a mix of the two :) I like.
I'm also wanting to meet this Cullen guy to see what happens there. But if you want to keep this story unique then just make sure you don't fall into the many pit holes that would make this story like half the others on this site, plan a few twists, and you know, it doesn't always have to turn out all right in the end.