what makes boobs bigger aside from surgeries?

besides genetics, gaining weight is about the only thing besides surgery to make them bigger.

At 16, your breasts are probably not going to get bigger on their own without getting pregnant (something I would not recommend until you are ready) That said, you can do things to make the area under them bigger and also to enhance them. Try wearing shirts with form, such as button-down tops and things with v-necks. Also, make sure your bra is the right size for you, you can get fitted in a specialty store like Victoria's Secret. Then, you can do some upper body workouts. Try to focus on the whole upper body, but emphasize the pectorals. Don't overwork them, or you will have square breasts, but try to build up your upper body muscles and the fatty tissue will stand up on top of them. There is also toning cream if they are saggy, but that is probably not an issue. Also, without 'stuffing', there are slightly padded bras you can wear to enhance the natural shape. You probably don't need and under-wire unless you have sag.

Nothing wrong with 32B, you must have gained some weight around (34) while your boyfriend was home, since your cup size didn't get bigger.

It is true when you get pregnant and give birth, that your breast size does increase, but after the baby is born as long as you aren't breast feeding, your breasts with go back to the original size.

birth control worked for me. i didnt notice a difference until the second or third month so maybe you werent on it long enough? i'm taking ortho tri lo and love it! :) everyone always comments on how big they are haha.

have a kid and stop breast feeding

massageing them and handling them often