It is difficult for the two people to fall in love with each other, let alone the unrequited love between the two of them.
I thought that if we get along for a long time, we might be able to develop a relationship different from that of our childhood sweethearts, but until the other person shows up, all relationships will end.
If we can't be together, then do something for him, share the burden of the world for him, and maybe let him remember you forever. Even if you are no longer in this world.