Help me find this sad bl please

It was about this astronaut who went to another planet for some mission by himself, he made this robot of his boyfriend to go with him. He stays on that planet for a really long time and he asks the robot ‘when can I go home, back to earth?’ And the robot is like ‘earth was destroyed, it’s gone now’ so the astronaut is sad since his boyfriend is dead but now he roams the planet with the robot of his boyfriend