sexuality is just one of those things you are born with, you do not choose it, its just part of who you are, whether you be physically, emotionally & sexually attracted to males, females, or even both.
only you can truly know your sexuality becuase no-one can feel the things you feel except yourself.
some people think that if you are anything except heterosexual then you are abnormal or have a disease, but this is not so, people should except you for your sexuality whether that be heterosexual, homosexual or bisexual