A '95 V6, if you haven't had the water pump replaced by now, that is a likely source of problems. The "impeller" (a propeller like part that pushes the coolant through the engine) is made of plastic and basically falls apart after a while. My water pump (also a '95) gave out last year.
I wouldn't drive the car very much with an overheating problem. It's a good way to kill the engine or transmission.
It should be fairly easy for a mechanic to diagnose and fix this problem, so just take it in and have them take a look.
-R.
