I am a girl. And I am totally happy being that way, but sometimes I wish I could be a boy. I seriously wish I could just wake up one day in a boy's body and be a guy, but not forever. I like being a girl too, so I'm not trans. Also I prefer to read and write from a male perspective, if that is any indication of my identity.
other people correct me if i'm wrong, but i don't think just wishing that you were a boy doesn't constitute your gender, like say that your are a boy or maybe demiboy or genderfluid, but it could possibly if you actually feel like that is part of your gender?
You could be genderfluid, or possibly bigender, depending on if you feel like you want to be a boy all the time or just sometimes.