Will my boobs grow?

I'm 15 and I'm an average weight and height (8 stone, 5 ft4). My mum has cup size D. I'm only just a B and I'm really self conscious about how small my boobs are. My friends ( I used to have bigger boobs than them) now have normal size boobs and boys talk about me being flat chested. I just want to know if my breasts will grow much more... Thank you 💜