What are easy ways to minimize ?

I'm way bigger than a C-cup and i'm so self-concious about my huge . I'm almost 15. I can't wear tank tops because they spill out the sides. I tried wearing a halter and my s looked all smothered and my was ready to take over the room. Certain dresses make them look heaving. Bathing suits, guys are always whooping and hollering and it makes me so annoyed. At slumber parties, the girls are always staring at my in the pj top, when they think I don't see them, because the look like they are falling out of the top of the shirt when I lay down. Are there any ways to make my mive chest look smaller? And to deal with the whooping guys?