Forget the past, live with the present and embrace the future with open arms. What is gone is gone. you can't go back to the past. You will not heal by going back to what broke you.
That feeling of just wanting to drop everything and leave it all behind. Beware of it. You might lose what can't be returned. You might want your reality back. You might regret the consequences to come.
But don't be afraid.
Change brings good and bad. It will open doors and seal others. What you do with that opportunity is your choice and only yours.
So, beware that longing or if you can't, embrace what is to come. For what is to come is everything you wanted and everything you feared.