Hard to say. A lot of gender role disconformity as a kid, but nothing bad, except for being closer to the groups of girls and never fitting with the guys. At 11-12 wishing to be a girl, but ultimately accepting that miracles don't exist (neither god, last thing to go away after Santa Claus). In an age without information on the matter and after years of being brainwashed into "you need to be manly, girly is bad an inferior", in which hormones were unknown and the foklore knowledge is that they only were "gay men with boobs and dick", I did not give it a lot of thought. I had enough to worry with studying. Never mentioned it to anybody, afraid I will be treated even worse.
The "wanting to be a girl" was relegated to a fantasy ("If I had been a girl"). Appearing in the background, being easily forgotten, but still there. One of those things you only think of when you don't have anything else to do. At 16 it went higher again, but I had a lot of problems to deal with and getting close to my first existencial crisis. Never seen as manly, only accepted in a group of girls, to the point of being the confessor of a few delicate things. All of that life went away after a bad year of career, depression, and finding that a lot of people were not as friendly as I thought. I had to restart my life all over again, new friends and everything.
So then we get finally access to the internet in 2003, and things start to speed up. The fantasy, a bit dampened by all the problems was back at full power... Until the day I caught myself with nail polish (yes, me too with the toenails, I was happy to carry it as a secret), removing every hair.. ANd I still wondered why I wanted to wear a skirt, even a kilt would have been more than enough. It just went up in desire of wanting to be more femenine and blaming my assigned gender, still trying to "accept the reality". Internet was also destroying the myth that society engraved in my mind that they were only "gay crossdressers with fake boobs".
It keep getting worse. I was more attracted to the theme, and one day I saw timelines of people transitioning, and it was as if my heart stopped. This is what I wanted all my life and did not now it was possible. They are normal persons, and beautiful. All the stereotypes are just lies. Then the biggest denial stage started, doing a lot of odd things to convince myself I was a normal male. It got even worse. I had never been very manly and wondered what was missing in my life, and the feeling of when I hanged with those girls came back. I tried to get with "bros", but I felt like an alien, far from his planet. The more I wanted it to dissapear, the stronger it came back to bite me.
Final breaking point? Trying to get in a romantic relationship again, fail miserably and one day, realize that keeping a male role in the bed was even worse than in the normal life, to the point of feeling that penetrative sex was completely wrong and unnatural.
So, more denial, more depression, and in the end I had to accept it. More crying about why I did not realize it years ago, if it was not too late, if I did not have possibilities with my horrible face... Although it is not going to be as easy as I was thinking...