Even though I'm not yet out IRL yet, I definitely relate.
When I got to highschool I sought out the guys, just like elementary school, but they made fun of me, tested me, etc. like guys do. At that time I was too insecure of myself to take a stand, and I took them WAY too seriously (previously I never really had to 'prove' myself, just make sure they knew I could take a hit, wasn't afraid of dirt and liked doing the same things. AKA: just being myself), I developed a slight hatred against guys, cause they were always 'saying stupid things', now I see they WANTED me to take them back all the time. They wanted to see how much I could take (which wasn't much), and if I had just taken a stand they would probably have accepted me.
After that I had a really 'female' phase (NOT 'feminine' but definitely identifying as a tomboy, and not a boy), and I only got back to my male self as my confidence started to grow again.
Though I have some "feminine" traits (so says society, lol!), but a lot of those things, I think, are either taught or not suppressed, like with most cisguys (say; emotions), and I feel either way like I should change those to become 'more of a man', but the other way... I also think "WHY!? What does it matter if I'm not a stereotypical guy? And all those things are just stereotypes after all!"
Personally I also just HATE the company of super competitive 'cock-y' guys who do crazy things just to 'be part of the group', I'm not like that myself either. WHY should I even prove myself, eh? Friendly/positive competitions are good, but not when it starts to take over group matters. I am who I am, and I see no need to 'prove' that I am 'worthy' to be me.
Most of my male friends are either not competitive either, OR are with other guys, but not with me 'cause I'm a "girl" DX
What I hate most is that people see this body before they see me, and I would never have to 'prove' that I REALLY am a guy if I were BORN as one!