It's easier picture them dead

Not to wish anything bad upon them, but it's for your own sake to be able to move on.

There’s a Chinese word — “缘分 (yuanfen)” — that has no true English equivalent. It’s the idea that some people are meant to meet, like a thread of destiny connecting them.

When yuanfen ends, even if two people live close by, they may never cross paths again — not in this lifetime.

So give up on the fantasy, picture them already dead. It won't hurt any less but at least you would not think about reaching out to a dead person.