It's not a cliff top thing. It's gradual. You begin to take an interest in life around you. You no longer have to do internet searches and the like. Being apart isn't painful. You know the (m) other is still there. You don't have too keep testing the T.

Your own emotions are more stable. You're not one thing one moment and another later in regarding the T.
You can tell by the pattern of some of the posts here.
One minute is all over the place and the next it's all back together. That begins to balance.
You begin to feel more your self. And you keep that feeling of who you are when away from T.

Others might have different experiences of it.