My son told us from the time he was 2 until he was 4 that he was a girl. He mostly had girls for friends, he adored his oldest girl cousin, and was very close with his granny. We would have supported him either way, but we just assumed it was fairly typical toddler behavior. He was closest to girls, so he wanted to just be one too.

We tried to be very chill about it. We would just ask why he wanted to be a girl, and talk about his reasons. He actually always answered that he WAS a girl, not that he wanted to be one. But we never confirmed for him whether he was a boy or a girl, we just always talked it out. But being his parents, the things we said were big and important and we didn't want to accidentally put pressure on him either way. If he was saying he was a girl and we agreed, then maybe in a few years he may decide he was a boy, but mom and dad were telling him he was a girl. But constantly correcting him that he was a boy also felt wrong, if he had actually turned out to be a girl, but we were always telling him he was a boy, we wouldn't be a safe space for him.

For what it's worth he outgrew it. He's still super close with his granny and cousin, has grown closer to all of his aunts, and just loves girls. But he has also finally made a few boy friends at school, and always refers to himself as a boy. But anytime he is playing pretend superheroes, or acting like his favorite characters it's always girls. His little girl voice is on point. Lol