I started espousing the value of NOT being a couple when I was 12 (or so I’m told), but I really believe that. I honestly believe that coupling up is something that we are sold and it isn’t necessary or even a benefit. I don’t want to be taken care of and I don’t want to take care of anyone else.
I re-read this just to go back to the beginning, and what really struck me is that you say you've had this belief since you were almost before a teen, and also you say that the thought having someone around all the time makes you nauseous

Maybe it's a scary thought, but you might go back to what happened in your life to plant this idea in you, and why you've clung to it so mightily. Not that there's anything wrong with choosing singlehood, but it sounds like maybe you are starting to question this long held belief, and that just maybe you don't want to screw up what could be a good thing because you've closed yourself off to that possibility. Haha, as usual I am going to suggest some personal counseling, taking a look at this core value, where it came from and if it is still valid for where you are now in your life.