Questioning Male 21

I have questioned my sexuality for a long time now and have begun to realize that I am gay. It is a good feeling finally accepting myself and understanding my feelings. It's odd, though, because I could never picture a future that I would deny having sex with a women (which would make me straight). So I must be bisexual, but it feels like I have to choose between being straight or gay. And I am unsure which gender I prefer. Not sure where I'm going with this post - maybe some advice or helpful feedback. Thanks.