John Gottman has a list of predictors of marriage failure. You can find it online. Unfortunately I didn't become aware of his work until too late but it might be helpful for you.
Knowledge is power.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss