It just all of the sudden stop blowing cold air. But i havent used the a/c in a very long time so i dont know when exactly it stopped working. The compressor turns on and remains on when i have the a/c on. Im thinking i might have a leak, but if i have a leak, would the compressor turn on?Does it blow cold sometimes? Does the compressor turn on and then off after a bit? Have you replaced the thermal resistor behind glove box?
If your AC does not blow any cold air you may have a leak, but you should see hear your compressor turn on and off continuously.
I'd change the thermal resistor and check your pressure.