Guy De Maupassant said this quote

Get married, my friend, you don't know what it means to live alone, at my age. Nowadays feeling alone fills me with appalling anguish; being alone at home, by the fire, in the evening. It seems to me then that I'm alone on the earth, dreadfully alone, but surrounded by indeterminate dangers, by unknown, terrible things; and the wall, which divides me from my neighbour, whom I do not know, separates me from him by as great a distance as that which separates me from the stars I see through my window. A kind of fever comes over me, a fever of pain and fear, and the silence of the walls terrifies me. It is so profound, so sad, the silence of the room in which you live alone. It isn't just a silence of the body, but a silence of the soul, and, when a piece of furniture creaks, a shiver runs through your whole body, for in that dismal place you expect to hear no sound.