As mentioned further up, being single is so much better than being in a bad relationship.
I can see both sides here as I am in a fairly new relationship after being single for almost 5 years.
I liked being on my own during my 'recovery' from my divorce. I am one of those people who withdraw in order to heal, so I was happy to talk to no one and have alone time. But it was a bit extreme and when the dc weren't here I was a complete hermit. I wouldn't answer messages or the door or speak to a soul except the dc. But i needed that I think.
Then my next phase come along which then included other people and I went for some nights out with other woman in my situation. And they were just off the scale opposite to me.... really trying to grab attention from men, flirting etc. I knew then that that was a nope from me as couldn't bear the thought of a man near me, never mind me instigating it.
Then a while later, things changed again and I found this out in the weirdest way. I went for a trip to a spa and got a massage and a bit of pampering. My reaction after this shocked me to the core. I made it to the car where there i just burst into tears and could not stop. The massage was lovely, but i realised how much I was craving touch from another person. It was nothing of a sexual nature, my therapist was female and I am not all attracted to females so I knew it wasn't from that point of view. But I missed just being given a hug, being held and just having skin to skin contact. I know some reading this might think this very odd but i didn't even realise i missed it until that day.
This is where a fwb friendship started, just for a brief time. But it was what I needed then. I didn't have feelings for him, and he moved jobs not long after but I felt okay then, as I had had my fix.
So I went back to being 100 single again and with the mindset that i would never ever go into another relationship. I couldn't be bothered thinking of another person again after 20 years of marriage which was a disaster, it was just too much hard work and took too much from me. Happy enough to do my own thing, focus on the dc and for once put me first.
Well then the unexpected happened. Met someone. Actually a very old friend just suddenly popped up again in my life. But the problem was that I had to rewire my brain again to accept someone new, as I was so set in my mind that I wouldn't be giving of myself to anyone ever again. Some days its hard I admit. I battle to share me now and I like my space. But I found someone amazing who understands that and gives me the space i need. Just taking it slow as I can't do it any other way.
Never in a million years would i expected to have typed this last paragraph out.
So yes, I was happy being single. But now I am happy not being single. I think it is what works for you at the stage you are in in your lives.
As an aside i have a recently divorced friend who is not coping being alone. She feels she needs someone in her life, and isn't loving her life right now. I think every person is different and some need companionship more from others, while some people are happy to do it alone. She is very extroverted, I am the opposite so I think she just needs people around her a lot.