my power steering is hard to turn and do i need to just change the belt?

First, check the level of your power steering fluid.

The power steering system needs to be fully examined by a mechanic of your choice. Both a steering pump failure and a steering gear box failure would result in hard steering. Steering is an important system that should be inspected by a professional. Thanks. dave@apexautoaz.com

JUST based on the way you phrased your question , I would seriously stick with answer #2. -Any unusual sounds when attempting to turn??