Hard to Meet, Hard to Part

Is it harder to meet or harder to part? The protagonists of this story will prove it through their actions. In this vast world, what, if anything, is eternal?

"I like you, Xu Yuanjie," Bai Yangming said.

"Oh? And what do you want to do about it?" Xu Yuanjie replied.

"Nothing. I just like you," Bai Yangming said.

"Marry me in ten years," Xu Yuanjie said.

"All right!"

But one week before their wedding, she died in an accident, and he took his own life...