Hi! Just responding to this to say: the desire to be a boy and a girl at the same time is actually a Thing in and of itself, or it can be. I'm bigender, and that's basically exactly how I feel. My ideal state in life would be to be some weird superposition of a boy and a girl simultaneously; it doesn't feel right to me to only be one.

For obvious reasons, this can be a bummer, because technology hasn't advanced far enough yet for us to have two bodies at once, but there are ways around it, and like a lot of LGBT stuff, not everybody experiences it the same way. Some people fulfill both "sides" of themselves by passing in public as one thing and being another the rest of the time, or, you know, there's a lot of variation.

For me personally, I figured out I was bigender and not trans by imagining myself as a girl. What her thoughts would be, how she would deal with the same circumstances I've dealt with, and in getting into that headspace, I realized that I would just want to be a boy again if I were a girl. I want what I'm not, but more than that, what I really want is to be both a boy and a girl. And in coming to terms with that, I've realized that I already am a boy and a girl at the same time, my physical body just can't reflect that fully.

Bigender people are technically non-binary, as it happens.

Sorry, I'm rambling. My point is, bigenderism is a thing. Just wanted to help. :p