When I was 5 I wanted a mohawk. As a young child, I screamed that I'm a boy. My mind eventually dissociated itself (I ended up growing boobs in the 2nd freaking grade) and my mind had a completely different image of myself than my physical body had. I started getting periods at 11 and was in hell. I was so frustrated, why did I have to put up with those? It felt just wrong. I was mad when anyone called me a tomboy because wasn't it obvious that I was a regular boy?
The summer before the 9th grade, I started wearing makeup. It felt like dressing up a mannequin when I had to put on a bra and panties. It wasn't my body. This wasn't me. The badass person who lived inside my head didn't look like this. This was just... Well, other people must have seen that really I'm actually a tough crazy guy and the makeup isn't me. They had to be able to see that. (I was a bit delusional).
It made me sick whenever anyone assumed I was female or like a girl. It still does. My boyfriend (now my fiancé) always used to say that chicks are crazy "Except you," he told me, and my mind wondered why he considered me a girl in the first place. He called me sexy, I wanted to be badass. People called me beautiful, I wanted to be one ugly b*stard. Now he calls me a sexy man and it turns out he was actually gay all along. He was thrilled when I got my first real binder, and we're looking forward to T and eventual top surgery. This makes me happy

At the end of my tenth grade year it clicked into place. I'd heard about trans people before, and wondered, and eventually stopped being in denial. I'd always loved my broad shoulders, deep voice, and peach fuzz mustache, but I'd wanted more male qualities all along. And with T and surgery I can have those

Fortunately I can pass sometimes pre-T. When people call me "sir" or "man" I rejoice.
Ironically, when I stopped forcing myself to be physically feminine, the more feminine qualities I had mentally stopped being repressed. Now I'm not weirded out by talking about clothes or hair, because my hair is awesome now and I can wear suits and be a dude.