Question.

I have two questions.
So I'm a bisexual(?) with the most beautiful girlfriend I could ever dream of, we were childhood friends and started dating like fairlbut, recently we were having an interesting conversation and it just rubbed me the wrong way I guess?
So she's been fine with me being bi and even is fine with me calling other guy's attractive but, not girls, I never thought anything of it.
But just out of nowhere during a cuddle session I asked: "Babe, why are you fine with me commenting on attractive guys but, not girls?"
And basically she explained the reason why is because she feels like: "Boys aren't dating material for you, they're just eye candy, I don't need to compete with them. Every guy you've ever dated Liz (A girl, my ex friend/crush.) dated first, it's obvious you just did that because you liked her."
I didn't know how to respond but it rubbed me the wrong way and I kinda just laid there upset I even asked?
Was she being biphobic or am I tripping and she was just being honest?
It also made me wonder if I might just be a lesbian?
I feel like with guys, I can appreciate an attractive man but everyone like my girlfriend said: I've never dated a man because I liked them.