They're not all they're cracked up to be. As you get older you may find they're quite uncomfortable, even if you find a bra that adequately supports them. Big boobs come under the category, "Be careful what you wish for. You might get them."
What are some advantages of having flat boobs and a flat butt? (like me) Im 13 and im wondering is it that im not as mature as the other girls or is it just from my skinniest.
I have big boobs, because of that guys have falsely made assumptions about me.
They have thought that because I have boobs, the blood must not reach my brains and am not bright. (I have an above average IQ)
They assume if I have big boobs and a tight shirt that I must be easy because I am showing them off. (Of course my shirt is tight, they make them for people who have a B or C cup. And if you buy one to fit across the boobs it hangs off the shoulders. And you look frumpy.)
Guys also have trouble looking at your face when talking to you. I have grabbed one or two by the chin and brought their eyes up.
Enjoy being flat for now. You are only 13 and you have plenty of tie to grow and mature.