Boobs 😞

I'm fourteen, eighth grade, and I have 32B size boobs, everyday a girl with 36DDD sized boobs (she is thriteen but in my grade) makes fun of me and says things like "Oh you don't know anything about having real boobs yet." And "Guys only go for these *sticks out chest*" and my friends are either guys or they are girls that agree with her and I'm really self conscious about it now and I have no one to vent to who won't judge me or tell me to ignore her/them.