How do I avoid people thinking I'm gay?

If you were probably to sit down across the room you'd probably think that I'm gay, because all I do is stupid things such as dancing around, dancing. Things that straight guys don't do. The only reason that I do these things is to hide my real feelings because my whole life I grew being called gay, , fag and I'm tired of it. So the only way was to act stupid and gay. Plus I dress pretty feminine because I wear skinny jeans and I'm into wearing ethnic things almost bohemian like. The way I act is stopping me from doing my full potential. I'm a sopre right now and I've been the president for the past two years and involved in jrotc. It will probably stop me from getting into the Naval Academy or any military service academy. But I'm just not a regular person I'm not into sports like football, or basketball, i'm into tennis and feminine sports like gymnastics. Sometimes I wonder If I'm gay.