Girls are often slightly ahead of boys when it comes to physical development. They’ll soon catch up with you, height-wise, or even overtake you. You are tall at 180 cm, but not abnormally tall. Stand up straight and be proud of your height. There are a lot of advantages to being tall!
I'm the tallest in my school (180 cm). Why? No boy is ever going to want to go out with me when I'm a full head taller.