I can hit high notes but in a different voice?

There's something about my voice, where I can hit notes as low as one
and a half octaves below middle C and near to two and a half octaves
for high notes, but it's always in a totally different voice.

When I hit an octave above middle C, it's the nicest singing voice I
have because it has a certain airy touch to it.

In middle C, it's my normal voice singing and I sound like a boy
singing. It's very clear and not airy at all and it doesn't have any
effects.

Below middle C, I sound like a man singing, it really goes down to a
burly voice. It's has slight quivering which my choir teacher likes,
thus he sometimes changes me with a few of the boys.

And two octaves about C, I hit a high voice that is airy at the end
but full and loud and can hit notes properly with ease. It sounds like
a choir but higher.

But what I really want is the singing voice I use commonly for the one
octave above C, any tips please? I'm working very hard but everytime I
sing a song, I start off with that singing voice that either goes down
to the boy's voice or the choir voice, and it really scares people and
I don't want that ;_;