Well, if you've gone this long, I'd suggest a new pump. The belt spins the pulley, which circulates the oil through the PS system....with oil just sitting there and not getting circulated, you're gonna fry the pump......that is, unless all you've been doing is driving in a straight line.:lol:
If you haven't driven around without a belt, I'd advise against it.
How on earth are you going to fry the pump without it turning, no damage will occur if you use without the belt on the steering will be very heavy.
Does the belt turn anything else? this miht be an issue. Still replace the belt as soon as posible.