This is based on opinion. Please don't list it on a work's trope example list.
Tear Jerker / The Time Machine (2002)
Vox explaining how he can remember everyone he ever talked to before the End of the World as We Know It tens of thousands of years earlier, including a little girl asking about dinosaurs, the last book he recommended, and even Alex asking "time travel, practical application."
Philby and Mrs Watchit discussing Alexanders disappearance.
"I'm glad he's gone. Maybe he's finally found someplace he can be happy."
Alexander realizing he can never save Emma. And he apparently can't move on in his time period without her.
He loses the necklace with her picture on it, as it dropped out of his time machine and sees it age and decay.