Alone

can be loneliness. 


"That was one of the things again: you saved time. You walked quicker, you got home and drank a beer quicker, you ate your supper quicker. And then the sex you had with yourself, that was quicker too. You gained all this extra time, Geoff thought - extra time in which to be lonely. Stop that, he said to himself. You aren't allowed to be a sad person; you're only allowed to be sad."
~Trespass, Julian Barnes