When we are busy doing something, and when it is over, we feel void. And to fill up this void, we try to get busy.
Many times to fill up the void is more of an emotional decision than a rational. Instead, when something is over, enjoy the void, let it be the void. Who knows, the situation might bring something even better.
Why can’t it be avoided for the time being or for an extended time too? A replacement is not always necessary.