The Heartbreak Messenger, by Alexander Vance

The Heartbreak Messenger is about an average, run-of-the-mill kid named Quentin. Quentin's dad left when he was six years old, and he and his mom have been just barely seeking by ever since.

 Quentin's best friend Rob's older brother one day approaches Quentin with a proposition: he wants to break up with his girlfriend but doesn't want to go through the trouble of having to do it himself.  So, he offers to pay Quentin to make the break for him. Quentin sees this as a lucrative opportunity, and before he knows it, he's running a full-fledged business.

Word spreads about his services, and high schoolers are approaching him constantly. Some of his 'clients' are less than desirable, and Quentin even winds up with a black eye. Before long, much discussion surrounds this mysterious, elusive, "Heartbreak Messenger", and Quentin struggles to keep his identity a secret.

Before long, his other best friend, Abby, has figured out what Quentin's up to, and is none too satisfied with his actions. Will Quentin stop, or is the money too good?

I LOVED this book - it was fast-paced, the characters were lovable, and the premise was so funny. It does have a romantic ending, but I'd recommend it to both boys and girls. It would really appeal to both.

Here's a book trailer from youtube: