Detachment is simply a matter of breaking away from focusing on or obsessing over your own expectations and unmet needs, and their hurtful behavior. It is a matter of acting out of your own strength and will, and being who you want to be as an individual, instead of reacting to what your WAS/WS does or doesn't do.

It isn't easy. Again: It. Is. Not. Easy.

But it's necessary for your own peace and strength and growth.

There are times in the past I did this very well and other times not so much. It's a matter of degree and we can all get far enough down that road that it helps us live well. It doesn't mean you don't care, act coldly, etc. It just means your day and your life no longer revolves around the WAS/WS.