Issue Of Sexual Orientation, Built Up Like Men, Get Attracted To Males, Occasionally Bisexual. Advice?

Sir, I m a 25 years old male. I have been suffering from a bizarre problem. It s nothing but the issue of sexual orientation . Even though I being a male, my sexual inclination is not that of a male always. Sometimes, i feel as if a gay, finds attraction to males and hates females. Sometimes, a straight guy and at times, bisexual. I have made up my mind and thinking several times. But I guess it is the disorder of some male hormones, which fails to play its role properly. Moreover, many have commented that my behavior has even got a shade of womanliness. I too felt so as my thinking are also on their line. Sir, i m built as a male and i want to remain so. So kindly help me out with your valid advice.