When you hit puberty you will grow, maybe to 5'7" or a mixture of mom and dad. This tends to happen at around 14 years old. Don't be so worried, it will happen normally, soon. Puberty is when your hormones start changing to get you to manhood. You will notice hair growth under your arms, legs, face and pelvic area. Your voice will get deeper and your Adam's apple will protrude. You will start to notice girls in a different way then before and what them to notice you.