Big hugs to you. I know it may sound childish but i felt like that at one point when I realized that I had put myself willingly into a situation that had become impossible, and I realized that it might not have a happy ending. Like I had up till that point lived in a world where everything except death was reversible. And where it ended with "and they lived happily ever after"...
I still think it will. It might not be the ending that we wanted; the story may take a twist and turn in another direction.
But don't give up on yourself. You have the power to create the life you want.