It's not ugly for boys to have bigger noses. I have a big nose when I see a superstar like Jackie Chan. Isn't it sexy? Jacky Cheung's nose is not small, but I think his nose is very nice. It is natural to look at your body with appreciation.
It seems that plastic surgery is very popular now. People are always dissatisfied with a certain part of the body and then change it through surgery. However, the rise of plastic surgery is only in recent years, and no one knows what kind of adverse effects it will have on the body. But forcibly changing your body shape is definitely not the best choice. Maybe in a few years, you will see some reports about the side effects of celebrity cosmetic surgery.
Anyway, I'm not very supportive of your plastic surgery. If it fails, the consequences will be unimaginable. If you really want to do it, you should also go to a regular hospital.
Finally, I hope you can like your nose, and I hope you will become more and more confident!