First, because you can’t. It’s an illusion and a waste of your time. Even if you are right (though you probably are not) you are giving up huge bundles of your energy and your consciousness to try to control another person’s life.
Second, get to the root cause: We try to control others to make ourselves feel safer. Note the key word, “Feel”. We don’t actually get any safer by controlling others. There’s that illusion again, but we are always trying to feel safer. Let that go and live your life—your
work, program, relationships, talents and gifts. You may or may not feel safer, but you will feel happier and more fulfilled.
Fourth, letting go of control is not easy. Feeling unsafe is just so unsettling. So share your goal. Share it with a few, close recovery friends; let them know you are letting go of control. But note: Do not tell the person you are intent on controlling that you are trying to stop controlling them. That’s a game, so give it up. It’s just another backhanded way of being controlling. Stop that.
Fifth, get some help. Try Alanon. Alanon will make your AA or OA program so much better.