Easier said than done for sure. Really, you shouldn't ever forget, because that would mean forgetting the lesson. I say understand, heal and move forward. You will eventually find new life and the past will take care of itself.
Activity for Chrysanthemum. Every time someone says something mean to her, kids crumple up a smooth heart. Try to smooth it out at the end when they say nice things. Message: hard to smooth a wrinkled heart. LOVE this idea.
Image about nirvana in words by On My Planet on We Heart It