I want a perfect jaw line?

Hello i am a 17 year old guy and everyday i notice (to me nothing will change my mind) a imprefection about myself my jaw line its rounded..i want i kinda of square like all my friends do what is wrong with me? have i not gone through puberty properly or something? i am a pretty skinny guy but i do have a little fat on my face but not enough to know i don't have a nice squared jaw.. this is really pissing me off i think im going to go through surgory if this keeps depressing me.. ughh please someone help??