I hate looking younger than I actually am.

I (17M) have looked younger than I actually am my whole life. I was born nearly 3 months early, at 4 lbs (not sure if that ended up affecting anything). My whole life I have been mistaken as being two years younger than I actually am. Not only do I have a baby face, but I am also short (5'6) and pretty skinny (120 lbs). I've got small hands and small feet, thin wrists and ankles, and overall just a small frame. Pair that with my young-looking face, and an inability to grow any facial hair, and people always act surprised when I tell them that I'm 17.