Ha, by saying to yourself you're bi but only acting on women because men and the whole idea are gross, would mean you are STILL in denial and STILL in the closet. Just trying to justify it.
I recently came out as bi to people, after a while. I was like you, it started with gay porn. First it was curiosity, then I realized... hey, this is actually kinda turning me on. Then I'd start watching it more often. And before that there were always guys I was attracted to out in life. But I just never really "realized" it. But dude, there's nothing wrong with being bi and pursuing both men and women. It makes for so many possibilities, and so many more options. I started talking to a guy for the first time recently and he's pretty great, and has a better ass than the last chick I was with. I've been a lot happier just in general since getting that off my chest. Men seem to just be sex objects to you. Shameful sex objects, and you seem to be depriving yourself. It's okay dude, really