@Femguy,
Where to begin?
Being gay, or bi, or het, is something you're born with. It doesn't come from chemical imbalances or molestation (although I caution you that (a) we are still learning about the human brain and (b ) being molested will certainly **** anyone up in all sorts of ways).
Behaving feminine (I wish I knew what that meant, seeing as women aren't one size fits all) doesn't make a man gay; behaving masculine (ditto) doesn't make him het. Instead, it's your attractions. Macho men can be turned on by other men. Metrosexual men can be turned on by women. These aren't square pegs in square holes - there is a spectrum.
I suggest counseling to you - strongly. Not only to help you find out who you are, but also to deal with feeling that you've been ripped off. Figure out who you are - which is wonderful no matter who makes your heart race.