Is it normal that i have fantasies about a guy friend discovering i'm a woman?

This is a little bit related to another post of mine in which I said that I always dress up and act like a man, but am not a lesbian.

So, usually, I don't let myself have any fantasies (for reasons), but one of them keeps coming back: I think about how great it would be if I had a guy friend who believed I was a guy. I already have many guy friends(actually, my friends are all guys), but they all know I am female; in this situation, the friend would not. By the way, in these fantasies, I never imagine someone in particular, I just kind of make a mix of things I would like in a guy, as a friend or as a love interest, and I "create a person for the fantasy", if you get what I mean.

So in the fantasy, we become best friends and at some point in the friendship, he discovers I'm a girl. This leads to him being confused, freaked out, but eventually liking me. Sometimes, I even imagine that he'd tell me that he's glad I'm female because he was already starting to have feelings for me, and he thought he was going gay, bla bla bla.

As you can see, this is kind of difficult to explain(especially because English is not my native language, please tell me about any mistakes I made, by the way), but you probably get my point.

So, is this normal and, if you were in the guy's situation, how would you feel?