Those who leave marriages looking for greener pastures often find them loaded with crabgrass. While only 50% of first marriages succeed, 60% of second marriages fail as well. In addition, of my divorced friends who never remarried, the majority of them were fairly affluent before and struggling after.

Some couples just can't make it work, but if there's a chance they can, I would recommend they take it. I used to work for a divorce attorney. I don't have statistics, but it seems that mental health issues are often a big factor in breakups, so both should probably see a mental health professional before calling the marriage counsellor.

There are some great medications these days that can really help with bipolar disorder and depression. A lot of marriages break up that shouldn't have to.