Why does Jesse feel that Leslie has left him stranded there like an astronaut wondering about the moon alone?

Jesse feels abandoned by Leslie because their deep bond and shared imaginative world have been disrupted by her unexpected death. The metaphor of an astronaut alone on the moon captures his sense of isolation and disconnection from the vibrant life they created together. Without Leslie, he grApples with profound loneliness and the emptiness of facing reality without her creative companionship. This feeling of being "stranded" emphasizes his struggle to navigate life without the person who understood him best.