How can I lose 22 pounds by school?

I know Atkins works fast, but it's too hard for me to do. I love carbs. I need to lose 22 pounds. I'd like to lose the wieght by school, but I know that's highly unprobable. I WILL NOT be a vegetarian. I just can't, and I need to eat some form of carbs. Can anyone help? What diets have you done? Tell me your stories please! I need encouragement. What diet works best & fastest? What about excersise? I live in Florida so no outside stuff! WAY too hot! Thanks in advance!!!