Yes, it exists.

My mom had a female friend who never dated in her whole life, and was a virgin when she died aged 76.

Actually, she was like a witch, had awesome clothes and sense of fashion and cooked very well. She sometimes held parties at her place but didn't interact with people much.

She preferred the company of cats or if it must be humans then toddlers.

Her social skills were non-existent but at the same time she was somehow above others, above the need for relationships and she was cool and had pride.

So maybe it's not right to call it "retardation". I think you should embrace your soul.