How does one help loved one, that is obsessed with work all the time? They can not switch off, they can spend hours chatting to work colleagues. But always tired or can not hold an conversation without it leading to an argument.

This is a very important question and needs a lot of thought to it. You would need a family counsellor or a mediator to help you start afresh through positive communication reevaluate your priorities in life and your marriage. how old is your marriage?