Small Breast

I'm really embarrassed about my extremely small breast. 
My boyfriend always tries to make me feel beautiful he says he "loves" my itty bitty tities. Our one year anniversary is coming up in 2 weeks. I want to wear something sexy for him. 
But my small breast make me feel so ugly. I don't know if I can even look sexy without embarrassing myself. 
Any tips? What's the best lingering for small breasts?