Author's name: MidwesternOracle

Character's name: Bill West/Dante Faust (the two main's I'm having trouble with)

Book: Just the Two of Us

Genre: Having a hard time classifying it, but I've put it under adventure.

Help: My story is a very character driven one, with everything happening chiefly as reactions to everything else (does that make sense?). The problem is that Bill and Dante appear very flat and one dimensional, and I want them to feel more real. How does one convey depth and personality in a way that will make the reader care?