As my first boyfriend was when I was 15... that would be 14 years! Unless you mean between boyfriends which would be about 3-4 years. I've never been super driven to be in a relationship and pretty much just let it happen naturally instead of hunting for someone. Now I'm on the prowl though.

I was married 26 yrs and then I started dating during the separation. It's been great. I starting dating casually and more recently have started seeing someone I like a lot but am still not 100% sure and that's ok. Being married at the end was the loneliest . It's like you're single but not.

After age 14, a few years, assuming single means not dating anyone in particular.1 marriage, 16 years, 3 long term relationships (5 to 13 years), some casual on-going dating.

19 years from birth to 19

The last 22 years. I became partially blind, and to most people that does not look like "husband material".

Of course as a gay man, "single" just meant "unattached" until recently when gay marriages became legal.

Four years....since my husband passed.

About two decades.

The last 2 years..Was married 30 years then had two men friends and learnt lessons. Been single 2 years and happy in my skin.

Divorced for 18 years.

I've been single for long periods of times, not necessarily out of choice at the time but I'm happy in my own company and seem to find things to do. I don't think I've ever been lonely or bored, especially now as being single (separated) again was forced and in hindsight necessary although the cost, not money wise, was high.
Will I remain single, probably, not because I'm not attractive to someone (I guess I am) but because I don't ask much and I'm really crap at hooking up with someone

I've been single for 12 years and plan at least 4 more decades.