My friend just grew big boobs out of nowhere?!

So yeah and i have very small ones.I know that it doesnt matter but EVERY guy from her class likes her.Most of them just like her because of her body.And no guy likes me.But oh everybody likes her.Even one guy came up to her and said that when shes older shes going to have bigger ones.Everybody likes her cause of her body and she defends herself and more.By the way she hasnt been talking to me.She says that shes not mad at me but i think she is.Anyways my question is how can i stop feeling inscecure about myself?