Im 3 inches and 14 years old?

Don't worry buddy, I was around that size when I was your age, i'm now 16 and my penis is 5 and 1/2 inches when erect. Remember men don't stop growing until they are 21 and if a girl is that petty to be bothered about your penis size then she obviously isn't good enough. You can't make it bigger yourself, you have to make it grow naturally. I've slept with 5 girls and none of them have complained, if you cannot please a girl with it then you can always perform oral on them!