I like a big handful and my hands are large. But small ones with perky nips get me hard. I have a friend who sends me pics of her masturbating and once in a while her tits are in the pic. Small....hard nips because she's climaxed or about to. Love those. I get my cock right out when I see her like that.
Let's be honest, men love boobs. They are lovely and bring erotic pleasure to us and to their 'owner'. Their loveliness does not depend on their size so you should not be concerned about yours. For me personally it is the nipple that is important. Of course your bf notices big boobs because they are more obvious. Be confident, I am sure he loves yours