1998 Mitsubishi Eclipse clutch issue or linkage issue?

When I bought this car it had 89,000 miles on it and it currently has 112,000. The only repairs I have had to make thus far is to replace the fuel pump and later, the clutch master cylinder. I haven't been able to use fourth gear pretty much since I bought the car. Later, even after the master cylinder was replaced, second gear would 9 times out of 10 grind but still would go into 2nd gear. Now it has started to sometimes start jumping out of 5th gear but that is usually after I had been driving down the highway for a little while. I don't have the long highway trips now so I haven't noticed any 5th gear issues now. However, this past weekend it has started to want to jump out of 3rd gear every so often. (Second still grinds unless of course you are slowly shifting and easing it in gear at just the right moment). A friend of mine test drove it this weekend after I asked them to take a quick look at it because I went to put it in reverse to leave and it was like reverse was hung up and I couldn't get it go in reverse for a second. They think I need a new clutch but the clutch doesn't seem to feel any different. Do you suspect the linkage or the clutch from what I have described? Also, I was told that worn bushings would also make it start jumping out of 5th gear like it was doing. Could bushings be wreaking havoc and causing any of my issues? Thanks!