How can I make my boobs smaller/perkier?

I am 5'4 and I weigh 122 lbs. Im a curvy girl with small waist. My bra size is a D and my boyfriend is not turned on by them. He only likes my butt that's it. I feel very insecure about myself that he prefers smaller breasts (he never told me this but I can tell... I know him). I've tried many exercises but nothing works. I have to live with these big ones :(
How can I make my boobs smaller/perkier?
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