Day is over and as soon as the sunlight went out completely an unknown feeling of loneliness grew.
I think is not someone who's missing, I rather feel a void that no one could fill, a void round which I've built my life till now.

Feelings of solitude and loneliness usually don't come round here but I believe it's like some one else said:

"when sadness falls
deep in the heart
like snow
it makes no sound"