This is so crazy......Can you HELP!?!?

My teacher wrote a book with her best friend and she wont tell us what it is for fear of being judged by it but i managed to get a few things out of her. Does anyone know a book that was published in 2008, it has two authors one male one female(they are pen names hense why i dont know already) the authors are from NJ, a mostly black cover, and it is fiction. And it has basically two main main characters one with a unique name and one with an average name .it is about teenagers and relationship problems. ugh she wont give me any more. If you have any ideas or have better luck researching can you give me an idea maybe.