Barry,
Please do not take offence but to explore marital difficulties should you not first see a marriage guidance counsellor?
The aspirations and hopes of many people in the Celtic Tiger years have been dashed, sometimes irretrievably, but you and your wife are still a going concern, you have four lovely kids, your health, a full time well-paid job and a house that's well in positive equity.
All that may change to the point where one or other or both of you will not recognise yourselves and have no lives outside this divorce provces for several years at a time when your kids will need huge amounts of attention.
The last two years have been particularly difficult for us too, and while nobody said marriage was easy, they don't tell you how hard it can get.
Add to this the coming together of personal relationship and health issues in your forties, as well as the up and coming young executives making you look over your shoulder and the middle years can be hell on earth.
But they pass, and kids grow up, and become your friends and you can laugh again.
Al I'm trying to say is that you may feel you're in a bad place now, but divorce may be worse, both emotionally and financially.
If you haven't already done so and found no solace, I'd strongly recommend you see a guidance counsellor of even just discuss this at some length with a friend or two - one friend has gone through a divorce, also speak to one who hasn't, who has stuck it out - to try to foresee both sides of the story.
ONQ.