There could be several different issues that could cause your concern. First, while running your A/C, carefully touch the low pressure (larger) A/C line and sense its temperature. It should feel cold while the compressor is engaged. If the compressor does not engage or the line does not feel cold to the touch, a refrigerant pressure issue may be a problem. If the low pressure line is cold to the touch, the issue may be with a air distribution system. A blend door under the dash may not be directing air properly ie the heater core may be exposed blowing warm air into the refrigerated air.
blend door motors are very common failures on these models.
have a shop check it for you as this may the exact issue you have.
the motor is about 80 and there is 1.5 hours in labor.
a shop can confirm this for you and give you a bid.