By no means do I have the answer to your situation. I will throw out a couple ideas though in addition to what PDM said, which were all great thoughts.
As was mentioned, every couple has their problems, and I have been told that there will always be issues between couples that will never REALLY be resolved. Since you're thinking about leaving after 5 years, some questions you should ask yourself are what can you live with? what can't you live with? and bearing in mind that you probably know him best (hopefully), who is he really?
