What is my gender or inner gender?

Im 16 and im a girl. Since i was little i seemed to get along better with boys. I dont like girls too much, like i always see them as a enemy insted of as a friend. I judge them even if i dont know them. And sometimes i was bothered as being a tomboy (girl who acts like a boy) when i was little. This bothered me so much i forced my self into being more girlish and ive managed it. I wear makeup, dresses, paint my nails, etc. And im pretty happy with it now that im used to it but sometimes, and not always just sometimes I feel like i want to be a boy. When i played multiplayer games online i would pretend to be a boy. But once or twice, last night for example, i dreamed of kissing a girl. And hold it there, i dont feel attracted to girls i am sure of that, but i am if i think im a boy. Its hard to understand but in that dream i was a boy, so it was ok. But if i am a girl, like i am then im attracted to guys. There are these moments in which i want to be a boy in real life, not a girl. I like boy stuff too like videogames, sports, and i cant stand girly things most of the time. And i think about people who might feel this way, getting a sex change, but i dont want that. I just wish i was born as a boy, like a proper boy not a made pretend boy by getting an operation. I also dont feel cery confortable with my looks, i dont know if thats maybe the problem. Soooo am i crazy or does this happen to you too?? I need some help, i cant really talk this out to someone in real life first of all because i want to keep it secret and im like the shyest person alive :(