The basics behind this article are in a great relationship book called THE SOLO PARTNER, the last chapter provides the meat and potatoes of pursuit and distance.
I think you see this in what you describe about your parents.
All this is fine however my belief is that you did not break your marriage so you will not be able to FIX it either.
As far as INVESTing in your job/marriage. Invest in YOU, then you are guaranteed to be happy. You can CONTROL you and everything YOU do. You can not CONTROL your W, so don't!
Let me restate, I am against DIVORCE. But you must LET YOUR WIFE GO. This is counterintuitive, but that is what DB is all about.
I am not sure STAY and SUFFER is a great choice but why must you leave to be happy. What about stay and THRIVE? Do you need her to make you HAPPY?