I spent several years wishing I was a boy and trying to pretend I was one.
There were several reasons.
Safety. I had already been sexually assaulted several times (and some more followed) so I thought being a boy, being one of the guys, laughing at the banter , laughing at "other girls" would make me one of them,give me protection. They'd defend me. They wouldn't look at me "that way" either due to "real" friendship or because I was too weird to be involved with. I was deluded and the years proved me wrong.
Misogyny. As a girl I was too much. Too loud,too funny, too giggly, too rough, too unladylike . Everything about my behaviour,my personality,my interests, what I wanted to do, how I wanted to live was just wrong. But it would be ok if I was a boy. So I wanted to be a boy. I thought i was behaving like a boy and thinking as a boy. It was the body that was wrong.
The laughed at, bullied,abused body. Too fat, breasts too big , pretty clothes not fitting it well, trendy clothes too revealing or slutty .
I hated being a girl , because that made me always in the wrong. No matter what was done to me I was in the wrong, because I was a girl that was girling wrong.
I definitely was the "not like other girls" type and preferred the company of boys. I sneered at other girls, calling them shallow and stupid and superficial, when deep down I hated them because girling came easy to them in my eyes. They just had to be , and they were the right kind of girl. Being a girl was the worst thing you could be. Limitations,shame, abuse, guilt.
If that was now, I probably be on the path to transition when all I needed was safety,love,acceptance, protection.