It sounds like your domicile is still NJ. Your lease and drivers license are only some of the factors. Other factors include social clubs, the location of your doctor and dentist, church, and your intentions. Another way to think of it is that your domicile is where you have the most loyalty.
You will, of course, need to file a PA non-resident return for income earned while you lived in PA. You will also file an NJ return to report all your world-wide income including your PA income. You will get a credit on your NJ return for taxes you paid in PA.
