1985 Jeep Cherokee

I just bough a 1985 cherokee 2.5L 4WD a couple months back. It was driving great until I noticed one day that the clutch wasn't engaging anymore. I would push the clutch pedal in all the way to the floor and there was no resistance like there should be. I would pump the pedal several times and the clutch seemed to catch after a while and engage normally. Now the problem has gotten worse and won't engage at all. It doesnt' seem to be the clutch is the problem because I can still get the car into gear and drive, but I can't get the clutch to release and move into second gear. Is there any solution on how to fix this problem or even diagnose it?