I'm going to be 13 in Aug and I'm 4' 11''/5'' 0''. My dad is 6' 1'' and my mom is 5' 6''. My dad's family is pretty tall, but my mom's family is kind of short. My sister that's 16 is 5' 8''. What I want to know is, how do I keep from being 6' 6'' or whatever, without smoking or taking drugs? I...