YA Dark Romance/Mystery Thriller Count me in!

This sounds like a good YA dark romance. When your best friend dies, the forbidden thing to do is to fall for her boyfriend. But what secrets was her best friend keeping from her? Did it have anything to do with the best friend's death? I have so many questions here based on the blurb alone. You know a book is going to be good when the blurb leaves you on the edge of your seat.