Is my crown thinning?

[joao needs help]

Hello, I'm 17 years old and a friend in school noticed this on me. I'm quite worried about it. The only person in my family that is bald is my grandfather for mother's side, and my mom's brother, but they doens't have the same mother.


Please, answer me as sincerely as you guys can. Thanks for the attention.

(First time doing this, sorry if I did something wrong)