I need some help guys!

So I like to watch lesbian porn alright and I have some thoughts about women sexually but I can never see my self actually doing it but I would if that makes sense. I don’t know if I’m bisexual or not, but if I am I would never tell anyone. Not because I would be ashamed or that it’s a bad thing but I just wouldn’t ya know? I’m still thinking hard about it because I see some girls and I find them very attractive but other times when I think about being bisexual I would never think I would be. Can anyone help or tell me how they knew for sure they were bisexual? Please and thank you 🖤