She affirmed that he was living a more peaceful, happy life before attempting to leave.
It seems obvious that she didn't forget why she pushed him off the stage. She cared and thought he had a chance to live a happier life and didn't want him to die. Strange that that delay is what gave her dad enough time to stop her from succeeding in her own attempt - and allowed her to live a more peaceful life.
Telling him not to come back seems like she meant it for both of their sakes. They share a genuine bond, but they're also really unhealthy for each other, and she seems very aware of that. Maybe she even realized it as early as the day of the festival.
They went their own ways, but it was a peaceful parting. It's still a really sad one, though.