B wanting to expand and improve range.?

I can understand your frustration. I started singing in choir this year and I had absolutely no head voice. I even had troubles singing middle C, and yet my lowest comfortable note is a low F (I can go down to E, but I don't like it since it makes my voice feel sore). The choir director seems to think I have this amazing low range (Soprano mentality I guess. LOL.) and I had no upper range that she placed me as a B 2. And it really drives me nuts too, considering I want to be in musical theatre (and in my personal opinion the low b line sounds very unattractive). But now I have had some training and I can go up in the area of high F. Two important things that helped me: Don't be afraid of the higher notes (they will come to you if you relax) and watch your breathing and make sure you are singing from your diaphragm. If you do these things and practice, your range will increase (as will the tone of your high notes).