If you were closer I'd just pop in and take a look at it for you.
Next time you are around the car start it and turn on the ac. Pop the hood and look at the Ac compressor below the Power Steering pump. The pulley and clutch should be spinning. If the pulley is spinning but the clutch assembley (part on the front of the compressor) isn't then it's not engaged. You'd probably also notice engine RPMs up between 1500 and 2k.