Leave the room or sit there with a smile plastered on your face, through gritted teeth - it is NOT worth it (trust me!!!!)
I have to say that you look absolutely stunning in your avatar pic - such a pretty girl!!!!!! Don't spoil your diet (and your looks - dare I say??!!) for the sake of some fatty, greasy, lardy pizza which will just give you a heart attack!!!
Go have a nice cuppa peppermint tea to fill you up instead and be all smug cos you're getting thinner while they're piling on the lbs!!