Try reloading before that, and go to the girls tab, and press the "CUSTOM NAMES" button. Then chose to change the name and relationships, even if you keep the same, then try again talking to Amelie.
its to late i have continue the story !i need to start from the beggining? or i can somehow to talk to her again? i have change the custom name
Yes, you can farm for hearts at the forest, though they have a low % to drop. If you get 5 hearts, you can restart amelie's branch
