Why does my face look so much younger than it should be?

im 22 years old and my face still has those smooth rounded type features and soft skin like a baby face or something, sure its a little rougher and i can grow facial hair but that doesnt change the fact that people always think im like 16 years old and just a week ago i had to show my ID to buy fireworks, is there any way i can look more masculine? are there like facial muscles i can define better or something? or will i just have to wait until the aging process finally hits?