Age girls develop breast buds. If your order is placed by 12 noon, it will be ready for Pick up from 4 pm same day. Erie Shores HealthCare So just push that "cleavage" stuff out of your mind! But they may show off, tease, or act silly as a way of getting attention from or interacting with them. She will fear rejection, imagine herself to be unattractive, and be concerned about sexual relationships and marital potential. Instead, I dated older boys, who seemed more respectful. I cannot predict when exactly you will get your period. I hate it.