There is a difference between lonely and alone; but sometimes the choice to be alone can be lonely. Although I imagine there are those who feel quite lonely even though they have chosen not to be alone.
Choosing to be solitary does not necessarily mean loneliness nor being alone but sometimes it's just so daunting knowing you need to go home to an empty apartment. There are certain creature comforts that come with companionship. For example, having someone to cuddle with in bed. Of course, then that someone usually expects you to shave your legs on a regular basis, but still, it gets hella cold at this latitude and it is pleasant to have someone keep your feet warm.
So I bought some cozy socks and I still sleep on the couch because your bed doesn't seem so empty when you are sleeping on the couch. But then your bed accidently starts accumulating clothes and turns into a kind of express lane closet and then even if you find someone worthy of visiting your bed, you can't really invite them over for a cup of coffee at the end of the night due to the three or four mountains of clothing heaped on the bed and sorted by degrees of cleanliness.
So I think I'm going to clean my room. But I'm not shaving legs yet. This is a process, you see.
(Oh, and I took this image from George Lindmark's Fantasy Paintings site.)