I believe that some of your problems might be caused by the prudity in the USA: So as far as I know from this forum, the only breasts you normally get to see are in magazines, where the photos are made from professional photographs, photoshopped, ... I´d call them cyberbreasts. ^^ So if these are the only breasts beside your own one, you ever get to see, these are also the only one you can compare your own one. And sure loose real, natural breasts against modified, non existing cyberbreasts.
If you would live in my country, i think the easiest way to help you, was going to the normal spa. So you are a young woman, which normally means everything tight and so on. So normally just being a young woman allows you to have some of the prettiest breasts around. ^^ Its really making me sad, that you are so sad about that and cant see yourself how nice your completely natural breasts are compared to normal average other natural breasts. I think one hour in the spa with everyone from 3 years up to 90 being naked, could show you, that there is no "problem" you have. I mean I am 33, eating healthy, doing sport from time to time...so sure they look a little different from the time i was 20, but still compared with the average population, I am in the top 10 of 100.
So sure, compared with cyberbreasts I loose... but the thing is, you seem to be afraid because of your partner might like other womens breasts more. But you have an absolute advantage all these woman cant match: You are for real. You are there, right in front of him. You are no picture, done by an photograph after an hour of playing with the shadows and the lights, so everythings looks perfect. And you are not photoshopped. So I dont know your partner, but I really think, that a look at your real boobs, will exite him far more, then a look on some bodypainted pictures can.
If you dont believe me, you could test it. Go through the streets, show men a picture of this bodypainting women, and then show them what you´ve got. Then compare their reaction. ^^
So the last one was a joke, and I think in the USA you could even get to jail for doing so, but what I wanted to say is that most men know the difference between reality. So they know, that these pictures really look pretty nice but most men also know that they are not reality and dont compare reality with this photographs. When you compare fruits and their tastes, you also choose fruits that are in reach for you, that are real. So sure in an incredible large universe will be better fruits. But who cares, they are not real for us, as long as we dont have a chance to ever reach them. And the same it is with pictures. They are nice to look at, but normally people know that they are showing something non existing and dont compare reality with these. Reality I have in austrian spa, and as said, even with 33 I am clearly on the winner side.
So they might have any advantage you want, but you have the ultra advantage of reality.
And reality normally is quiet nice to young women. ^^ Even to me its still nice. 