You never lose the old, only gain the new.
There is no such thing as "getting over it." No such thing as "healing it." There is only that new self, that new life, you build for yourself. Once you live through hell, it always remains in your memory, in the solid bands of strength that define your character. Walking through hell--climbing out of it--defines you. Don't hate or regret it. Just know, no matter how far you think you travel beyond it, it will always be ready to assert itself over your life.
You can only keep moving forward. You can choose to walk away from it, toward joy, toward a good life, toward Heaven and all of God's blessings. You can choose that for yourself. You can do it every day.
Scars remain on the body. A scar is not something fully healed, but a permanent mar, a flaw that might be gruesome and unrelenting. Yet despite all the flaws of the body, the soul continues to grow. With each new period of growth, our soul becomes stronger, wiser, bigger than it used to be. We can move beyond our flaws. Eventually, we grow beyond our scars and move on to better, higher selves. But we will always remember the darkness that made us what we are.