You're young. You may not be the biggest breasted woman as you get older but you'll likely grow. Breast size changes all through life. Going through puberty fully, then pregnancy, then menopause, etc. Hormones constantly shift and our breasts can change size from that. Also, as we lose or gain weight, our breast size changes. Be proud of who you are and try not to worry about your breast size. It is what it is. You'll likely grow some down the road. good luck