No way are you a quitter, you can prove that now that you've been on here and stuck with it 100%. Good for you, I am the same though, it's got to be 100% or nothing really. Doesn't make sense to me to cheat on this, I'll only be cheating myself and wasting money too!
You're right though, this diet obviously does suit you cos of your great losses. Well done and keep up the good work for the few weeks you have left!