I'm a Creative Misanthropic Introvert, so: Yes.
Being single doesn't really bother me, I'm quite used to it.
My longest relationship was 8 years, from 16 - 24.
Then I had a 3 year relationship from 24-27.
And that's basically where I got my fill.
I quit caring after I turned 30.
I'd always told myself that I wanted a relationship where the two people build a life together instead of one person just waltzing in the door of the other and being like: "Hey, cool life! Can I crash here for a while and take advantage of you so I don't have to be a responsible adult??
The later is, disappointingly the likelihood of most relationships.
I can't even be mad about it, because I just don't care anymore.
I've already been mad about it, and now I just passively accept it for what it is.
I got a tattoo on the day I accepted it, to remind myself for the future to not be a ******* and overly invest into others and to remind myself that if it's structural stability I'm looking for in life, that it's something I literally have to create for myself, and by myself.
I am getting older, I do not need the emotional validation of others in order to find emotional fulfillment within myself. Nor do I want to invest in starting a family that I cannot afford to start.
So as for happiness, I don't really define happiness as anything relating to romantic or platonic love, I define happiness by stability and healthiness. Which, is a progressive work in progress.
So far, I'm handling it better than other people I know because I actively try not to let that which detours or derails me become a permanent state of stagnation for me. I'm very much personally, internally driven by my external pressures and will to survive.
Life kind of shaped me into being the hardass that I am. Which, in this day and age, is also part of why I'm so socially reclusive. It's not my intent to run around offending and trolling people, I don't have the time and energy for that. What happens instead is that I just exist as I am, and that upsets people. So it's more worth my effort to just not socialize as much, and since I'm introverted, that works in my favor.