Butter by Erin Jade Lange

Butter is a junior at Scottsdale high.  He is an amazing saxophone player.  I decent student, who just happens to weigh 423 pounds.
He has been bullied and teased about his weight.  His mom worries about his weight and tries to help him to the point of irritating him.  He also has a secret double life with a girl at his school.  He is Saxman on the Internet and attracts the girl he has a crush on Anna to become interested in him.   However, she wants to meet.  They agree to meet New Year's Eve, but he doesn't really plan to keep his appointment.
In the meantime, the teasing and ostracizing gets worse.  Now he has posted a website called butterslastmeal.com, where he is planning to commit suicide.  He is not sure he really means it, but everything spirals out of control when students at his school begin to egg him on.
I am not sure if this book is really middle school appropriate, but I thought it was a good read.