Do your parents know you have this inner turmoil. Talking it all out may help you put your true feelings into perspective. Hormones are a funny thing. It may be you don't have enough male hormones at present in your body. Puberty has alot to answer to as its a difficult confusing time for teenage boys & girls alike. Has your voice broken yet.
your hormones are out of balance. maybe your lacking testosterone. I understand how you feel, I've never been very feminine & am a little boyish. but deep within my spirit I feel neither male nor female, its only my outer shell that makes me so.