Time is precious, especially yours. You have things to do, places to go, and people to see. There’s no room in your schedule to invest your energy in a relationship with anyone who’s anything less than what you need or want. You’d rather be on your own until the right one comes along that makes you want to make the effort. You want something that’s full-time not part-time.
You’re not single.
You’re simply waiting for someone worth your time.