Hello Nfscarbon07: Well... I don't really know the answers to your questions. My personal thought is that most of us probably have some sexual orientation tendencies in both directions... presumably some more than others. My thinking would be that the experiences you describe don't necessarily mean you're gay or bi or anything else. They just mean you're human.
I would suspect your reaction to seeing two men be intimate is as much acculturation as anything. Would what you are experiencing be something you can "come out" about with friends, family or your gf? I don't know. I think this is something you have to judge for yourself.

Depending on the extent to which all of this is of concern to you, perhaps talking it through with a therapist would be beneficial.
I'm an old man. But I've struggled, in secret, all of my life with gender identity issues. There came a point a few years ago where I finally decided to open the closet door just a crack. What I found was that no one really wanted to hear it.

They just wanted to pretend I never mentioned it & to have everything go on as it always had... which is what I did. However I couldn't (& still can't) forget the fact that I opened the door.

And, as a result, I've just ended up feeling exposed & foolish.

So having had that experience my recommendation has to be to be careful.
I see this is your first post here on PC. So...

to PsychCentral… from the Skeezyks!

May the time you spend here be of benefit.
PsychCentral is a great place to get information as well as support for mental health issues. The more you post, & reply to other members’ posts, the more a part of the community you will become.

Plus there are social groups you can join & chat rooms where you’ll be able to connect with other PC members in real time (once your first 5 posts have been reviewed & approved.) Lots of great stuff! So please keep posting!