I've known this since 11th grade biology. It is possible to be naturally immune to HIV virus due to a genetic defect that deprives the immune cells of a very important surface protein on their "skin" that HIV virus needs to attach and infect such immune cells. This defect is mostly common among those with European ancestry...about 5%-10% of the population.
Naturally this defect does nothing to the person's health.
It is known that some people have HIV virus in the blood, yet it never developed into AIDS despite 25 years of infection. And they've never controled the virus with drugs either.
You weren't being stoned.