When I was younger I knew that technically I was a girl but didn't really feel like I was. I didn't understand why I was supposed to play with dolls and like pink, when all I wanted to do was go outside and play sports with my brother and his friends. There were a few years where I wished I was a boy just so I would be allowed to do the things I wanted to without family making fun of me or trying to stop it. It was reinforced by my family mainly by not allowing me to do things.
It was tough for a few years but luckily I'm comfortable with that aspect of myself now. It took awhile but I realized that just because I'm a girl I don't have to act girly. I can be myself, and even though some people dislike it then that's their problem