In the story, Granny said, "What was it? Something not given back...." What wasn't given back?

As Granny is dying, she remembers the time she was jilted by the man she loved, George.  He left her standing at the alter fruitlessly waiting for him to show up.  She was extremely humiliated and hurt.  What George took from her was her pride,  her self-esteem, and her ability to enjoy a completely happy life free from bitterness.  Even though she married another man and had children and had a good, long life, she never got over George's jilting of her and she never was able to forgive him.  Thus, she is left bearing this anger and humiliation as she is dying and therefore cannot die in peace.