Joey, I am only suggesting the socket or crank to see if the motor is rotating freely. DO NOT try to start the motor with a socket wrench on the crank nut. Very bad things will happen if it starts! I am suggesting with the key OFF, try to rotate the engine just to make sure the motor didn't strangely freeze up as you mentioned. I have a feeling you have a voltage problem, the battery is highly suspect. If that's not it, and you can turn the motor freely by hand, some basic voltage/amperage checks should get you to the culprit.