I learned this from a colleague long ago. It works remarkably well with clients, friends, and spouses.
Instead of arguing when you are falsely accused or when someone important to you is making a mountain out of a molehill, try saying something like this:
“I really value our relationship. What could I do that would make it right again?”
If you get stonewalled (“I can’t imagine anything making things right again!”), ask what would make it a little better right now. Then ask again in a few hours or days, after you do what’s asked of you.
You may be as surprised as I have been. The same imagination that blew an incident out of proportion or turned an innocent action into a suspect one can imagine the relationship being fine again with very little from you.