I'm 13 and a 34-A I have a very flat butt. Many guys in my grade have told me that they would date me only if I had a bigger butt and boobs. My friend has huge boobs and she got her period after me I'm 5'5 and weigh 110 pounds. Why won't my boobs grow? So many people have told me I'm pretty but im too flat chested to have a boyfriend. Even my best friend said this