Story from both sides.

“I will fight for you till the end.”
“No, you won’t.”
“How could you say that to me! Everything I did in the past, I did it for you!”
“Not true, you only did what was convenient and easy for you.”
“But I still did it.”
“And that counts, I’m grateful too. But that’s not the same as fighting for me till the end.”

We often overestimate our own effort because we compare ourselves against doing nothing, while others see only the effort we did not make.