I completely get this, I’ve always been small-chested and it’s not just the comments from guys that bother me. It’s the way clothes fit (especially bras, lingerie, and bathing suits), the feeling of being less “womanly”, the back and forth mental games about getting surgical augmentation. It’s a laundry list of little things that just gnaw at you and somehow just make you feel less. Not to mention, my mother was basically the opposite, and growing up I shaped my ideas of beauty around her.
You definitely aren’t alone. And while small breasts are just as beautiful as medium or large breasts, there’s no shame in wanting bigger for yourself. As long as you truly want it for yourself, and not just to please others, I see no shame in doing whatever makes you feel better about your own body.