I prepared for three months, bought a diamond ring, reserved a restaurant, and planned to propose to my girlfriend of five years.

The day before the proposal, she invited me for tea and said, "Let's break up, I like someone else."
I hid the ring in my pocket and smiled, saying okay.
On the way home, I threw the ring into the river.
Later, she was with that man for half a year and then broke up, coming back to find me.
I said, "The ring is at the bottom of the river, go fish it out yourself."