A very good friend of mine is not in the greatest marriage. His wife apparently thinks everything is fine, but he doesn't, and although I do only hear one side of the story, if I had an unhappy partner I wouldn't deny something is wrong which apparently is her stance!
They have older teenage kids and other family commitments but am I being unreasonable in not understanding why he stays - you only have one shot at life and if being married to someone for the next XX years doesn't fill you with anything but dread, why waste those years.
If your relationship is one that you would hate your kids being in, why is it OK for you as a parent.
Does parenthood mean giving up a sense of self worth and abandoning happiness in the name of duty (although if someone was religious then duty may well be fine, but for the non-religious it seems a very lame excuse)?