George came back alone after the downfall of Voldemort.

Everybody knew why, tons of people had lost family and friends to the death eaters.

But it was only George and Verity who had lost a twin.

"I know how you feel!" Verity soothed when she found George crying in a storage cupboard.
"Verity, leave it. You don't."
"No, George. We can get through this together."
"WE CAN'T! YOU DON'T HAVE A CLUE WHAT I'M FEELING!" Sobbed George, pushing Verity out of the way and running for the door.

He knew the poor girl wanted to comfort him, she had experienced a twin getting killed too.

But she hadn't killed the twin.

From the moment Fred's heart stopped beating, George knew it was him who had killed him.

He had placed a bomb there, in Hogwarts, just a small fake one, in second year and set it to go off the day Fred died. So that the school would remember them as they would of been in their last year then. But he hadn't realized it was a real bomb until year four. He spent ages looking for it but when the war started, it was forgotten.

It was that bomb that had caused the explosion.
It was that explosion that killed Fred.

So no, Verity had not gone through what he was feeling.

'I just killed my brother, my twin, my best friend, my other half.'

Fred didn't just die that day, thousands of others did.

Including George.

He died in his heart.