Detachment isn't a method. Detachment doesn't feel like divorce.
Detachment is the wonderfully calming sense of relief you get when you decide to remove the ring from your nose that is attached to the heavy chain that your S has been jerking in all directions.
Detachment is the state in which you stop reacting based on emotion, and decide to take a healthier, rational, objective course, while letting your S proceed on their course at their own pace, as it must be.
You will "come out stronger and more complete", as you say, because you will re-prioritize your life based on your own objectives, that somehow you let go of along the way.
You aren't really "losing a big part of your being". That is already gone. You are refocusing your direction based on the current reality. That should feel good.
And none of this says anything about finality, or what might happen tomorrow, because those things just cannot be known.
