I'd associate being single with psychological disorders.
The definition abnormality of the mind that results in persistent behaviour patterns that can seriously affect your day-to-day function and life. Don't take me wrong, I'm not saying that being single means that you're crazy otherwise I'd be calling myself crazy lol
I just think that being single is a result of a protective mechanism, that those that have had bad past experiences with relationships, which our brain develops to prevent us from being involved with someone and thus getting hurt again.
"There is a reason I said I'd be happy alone. It wasn't because I thought I would be happy alone.
It was because I thought if I loved someone and then it fell apart, I might not make it.
It's easier to be alone. Because what if you learn that you need love? And then you don't have it.
What if you like it? And lean on it? What if you shape your life around it? And then it falls apart?
Can you even survive that kind of pain? Losing love is like organ damage. It's like dying.
The only difference is death ends. This, It could go on forever..."