Well, you certainly should accept that that's really unhealthy and people telling you so and offering advice for e.g. healthier food, including different kinds of pizza, are doing you a favor.
I'd suggest trying to stay away from pizza for one week and eating significantly more healthy at the time, too. One week. If you fail, don't worry and just try it again another time.
But before and during that week, pay very close attention to how you feel physically and mentally. I'm quite certain that you'll at least come to understand how bad your pizza nutrition is for you. That doesn't mean that getting away from that habit is going to be easy, of course, and maybe your friends can aid you there if you're open about wanting to eat healthier, but it's certainly important to recognize.
I currently badly need to stop eating damned ice cream. Bought and ate a pint yesterday and it's fucking ridiculous how my mind was racing for an hour this evening, trying to convince me I should go grocery shopping and buy some more ice cream. Even though I don't need to buy anything else and had delicious curry to reheat and feel satisfied, I still fought those thoughts for a fricking hour. And it'll continue for ~2 more days and then be suddenly nearly gone, as the immediate sugar addiction effects subside.
