The fallacy that they have duped you into is a language that acknowledges being gay is a thing. It is not. There are guys who have sex with guys, guys who have sex with girls and guys who dont have any sex at all. The same goes for girls.
Homosexuality is not an intrinsic trait, it is a behavioral trait and as such, it can be changed with different behavior.
Contrary to popular opinion, you cannot change inherent traits, like race or gender, no matter how you behave. If you wish to "become" homosexual, however, you simply start having sex with your same gender. If you wish to start being hetro, then you start having sex with opposite gender. It really is that simple. It doesnt matter about "who you are attracted to". Its about who you are *******.
You could be a guy attracted to Brad Pitt but as long as you were exclusively screwing Angelina, you are not a homosexual. This whole "gay" thing tries to bring it inward to feelings - once people accepted that, then anything you feel goes. Note first it was "we are born this way". As soon as the foolish public accepted that, out of the idea nobody could imagine someone actually WANTING to be gay - it was abandoned and replaced with the "identity" rubric we have now.