Hi TMW: I have done the same thing. Held onto too much anger too long. First with Ex. Then with my employees who shafted me and forced the closure of my business. I would lie awake at night just agonizing over it all. So I am NOT good at detaching.
But it is not healthy and I allow myself a minute or 2 of anger then put up the Stop Sign and force myself to "change the channel" - think of something good. Count my blessings. Make plans for the future.
You only have to live one day at a time. You can choose to focus on the positive or the negative. It took a LONG time to get to the point you finally rid yourself of that ass. It will take a LONG time to release all your anger too.
No get out there and smell the flowers! This is May and the sun is shining. Be happy!