Does a landlord have to renew my lease

Not neessarily. What are the particulars here? Are you a good tenant or a pest? All depends also on your written present lease and what it says about renewal as well.

No.
But there are a few rules. What happened and what state?

Where are you? In NJ a landlord is required to renew a lease unless you fall within one of 16 specific conditions. Tell us where you are the circumstances of your situation and we can give you a better answer.