I don't know if he ever had a boy friend. I lived the Warhol years, am a fan, read several books. He had access to some tasty men and must have sampled a few.
On the personal level he seemed asexual.
Curious to know who might have actually been a real boyfriend.
I thought it was Jed Johnson who died?
Somehow I ended up on a website that has a webcam of Andy Warhol's grave. Take a look.