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Do you remember boy when you were so cruel
Basically Ellie is trying to remind the boy that one day he was score to her and that she doesn't want him to be like that anymore with her. She just wants him to love her like any man should love a girl. However it could also mean that he has changed since then and she is telling him that she is happy he has changed from a horrible man to someone sweet and someone she can love in every way.