I can't really say if you need a cheat meal, or just want one. In other words, is this desire psychological, physiological, or a little bit of both? If you don't know, check out this article on cheat meals:
Try using the "Follow the signs" section to see if you fit the criteria.
One final point, I would say that based upon your food selection, it sounds like you are trying to justify a cheat meal because of food cravings, not an actual need. If you do need a re-feed, then for you, choose the type of food more wisely. That being said, 1 pizza isn't going to kill you. But at ~20% BF, it's a slippery slope and may lead you down the path to more and more "cheat meals" thus derailing your goals.