Let me put it this way, imagine you were put into a women's body, your brain and emotions are still the same and you would still mentally be a man but you're in a female body so you're not yourself, that's how it is for me except from male to female
Human beings are soul and body put together and that there is such thing as a objective reality and that has a definition to it and it has a character to it and it's not entirely dependent on our own subjective perception and desires and feelings so your true self if you're a guy especially a guy who thinks he's a girl you're a guy
the human mind is separate from the body which means theoretically if you were put into a women's body at this very moment you would still be a man you just wouldn't be in the correct body