I was basically the same. Insisted i was a boy, took off my bathing suit top because that's what boys did, refused to wear dresses or play with dolls (which apparently caused my mother a great deal of distress). It got really difficult in my early teens when I looked very much like a boy, as this made a lot of the other kids a bit uncomfortable when they realized I wasn't one. Puberty through college was certainly not the most fun time, but I'm perfectly well adjusted these days. I have never been "feminine", even work in a traditionally male field. I'm just stubborn I suppose, and was determined to do what i wanted to do how i wanted to do it. I personally don't see how pretending to be something you aren't helps, but for adults, i say do as you please.