Can I go from B to high baritone? ?

I honestly hate how I can't sing anything where it's written. I always have to sing down. There are no parts in musicals for bes. In chorus my line either consists of a monotonous progression or an "Ahh." I always feel inferior to the baritones and tenors. I hate it, so, is there any way, any exercises or routines, to help me sing in a higher range?