你忘了回忆而我却忘记了忘
[nĭ wàng le huí yì ér wŏ què wàng jì le wàng]
An ironic expression where it seems one party has let go of old memories, but for the owner, forgetting has become too difficult—they have almost forgotten how to let go of those memories. It's a poignant reflection on the asymmetry of memory and nostalgia between two parties.