Your original post does read more like a porn story than asking for advice. Don't get me wrong, I think we all enjoyed it. Glad you did too. I hold to the view being gay is about how you feel, not what you do. So what counts is not whether the sex felt good but how exciting it was, and the way you write it, it was for you. Now maybe you always feel like that with any kind of sex and maybe it was a bit of an adventure because it was something different, but sounds rather, 'how did i ever not do this before'. It will be up to you to decided which you like best now you got over the idea it is something you dont do. Not to mention the possibility of trying with someone you picked rather than who was there by chance.
She's always telling me how hot it would be if I hooked up with a guy. Just so happens she doesn't know about this one cause we were fighting. .
This one? She knows about others?
Considering she would be cool with it I see no problem in keeping this from her until I truly know how to feel
Well if she wasnt cool with it i see considerable problems in not keeping it from her. I have no idea how serious this relationship may be. If nothing else matters then probably you have no business having sex with anyone else without it being completely clear this is ok. But I dont think that is the case or you wouldnt have done this anyway. Personally I remember passing on having sex with someone - funnily enough also asian - who was a mate of my boyfriend because i could see a whole raft of complications if the story got back. Turned out later my bf had got there first, which i found rather funny when eventually I found it out years later. But your girlfriend might not look at it like that at all.
I thought it was really hot, but will I go completely gay?
No. You wont go anything. You will be what you already were.
That's some shit I have to work out first before I talk to her.
Yes. Not for her sake, though I expect that matters, but for your own. You need to know how you really feel and be at ease with that. I wouldnt say, hey, glad theres another good looking gay guy in the world, but glad theres another guy who understands where he is at.