Nearly every snowclone is the one where she dies at the end. It's a staple of the memory-sifting-through genre. You have to be more specific!
Farewell is about the girl with cancer, I think. Although I am inclined to think it might be the one about the car crash... No, the car crash was the one with the bunny in it. I can tell you for sure that it's not the one where her death is ambiguously implied with vague amatuer poetry. Though it could also be the one where she was shot? No, she made a pre-death video about how she wanted to be remembered, it was probably the cancer story.
Or maybe this was the one where she just moved away and they'd never see each other again?