How can I make myself feel better about my boobs? :(?

I'm 16, gonna be 17 in September and my boobs are tiny:( I wear a 34B bra, but I think my boobs have shrunk and I might have to get an A cup bra :/ I really want to be like a C! Cause I'm about 5"8 and size 8 or 10. Maybe if I put on a bit of weight my boobs would get bigger? Idk. Like if a guys feeling my boobs I get really paranoid incase they're like oh my god they're so small...I get push up bras and all so my boobs don't look that small, but when a guy sees them they're gonna look so much smaller than they do under clothes:( What can I do?! ps I put this in the wrong category before so I reposted it