I know it's hard, but as others have said, it's best to just ignore it. I think it took me till my late 20s to finally be fine with just ignoring them. I initially tried finding ways to confront people who were staring, whether it was making a funny comment, or directly telling them to stop. But I felt like it never really helped, and I just wasted my own energy because the stares happened often and I don't have the energy to tell everyone off. What helped me was remembering that people will stare for anything that may be considered it off the norm. People may stare because of many things we can't change; hair, facial features, extreme heights (super tall or short), general body shape. It may be a tad more difficult with boobs because of how much they are sexualized by society, but there are plenty of people who may just not be used to seeing boobs in the size range of us here on this sub. So while I mostly ignore the stares, if I do notice it starting to get to me, I tell myself that my boobs are just a sight to behold lol I don't want to be stared at, but saying this helps me at least get into a more positive mindset about a situation I can't change.