Plan ahead for next Friday. In the future make your own healthy flat bread pizza. You can control the cheese and maybe eat more with less calories. Hungry girl flat outs ate great at 90 cal a pop. Top with veg to stretch out the fill without all the calories.
I find that helps me to substitute a larger portion but similar item with less calories.
But one day of a little higher cal isn't going to hurt you just don't go. "oh no I blew the day might as well eat the whole pizza myself."
It actually is okay to give in a little once in a while and just live healthier in general.