HELP! What is the name of this book?

At first what you described sounded similar to Seize the Night by Sherrilyn Kenyon. This girl, Tabitha, runs a small boutique during the day and hunts Daimons (this author's equivalent of vampires) at night. But then with the other things you described I realized it wasn't but I think I know what book you're thinking of. I'm sure I've read it, but I'm also having trouble remembering it now. LOL.