This is what marriage is all about - Man and woman walking together, wherein the husband helps his wife to become ever more a woman, and wherein the woman has the task of helping her husband to become ever more a man.
It is normal for husband and wife to argue: it's normal. It always happens. But my advice is this: never let the day end without having first made peace. Never!
A friendship with a woman is not a sin. (It's) a friendship. A romantic relationship with a woman who is not your wife, that is a sin.
The victims of problems of the family are the children. The children. Even of problems that neither husband nor wife have a say in.