When do we actually move on?
The answer is "Never".
You will never move on, you just learn to live with it.
It's like a wound, that causes unbearable pain in the start, later becomes manageable and as time goes the pain fades leaving the scar behind.
Initially you will notice the scar often, then later attimes and finally there comes a time when you feel it becomes a part of you and that it is one of those little things that makes you who you are.