Actually, she never dated him. She just had a crush on him.
Source:
So what, and who, was Ayn Rand for and against? The best way to get to the bottom of it is to take a look at how she developed the superhero of her novel, Atlas Shrugged, John Galt. Back in the late 1920s, as Ayn Rand was working out her philosophy, she became enthralled by a real-life American serial killer, William Edward Hickman, whose gruesome, sadistic dismemberment of 12-year-old girl named Marion Parker in 1927 shocked the nation. Rand filled her early notebooks with worshipful praise of Hickman. According to biographer Jennifer Burns, author of Goddess of the Market, Rand was so smitten by Hickman that she modeled her first literary creation -- Danny Renahan, the protagonist of her unfinished first novel, The Little Street -- on him.
What did Rand admire so much about Hickman? His sociopathic qualities: "Other people do not exist for him, and he does not see why they should," she wrote, gushing that Hickman had "no regard whatsoever for all that society holds sacred, and with a consciousness all his own. He has the true, innate psychology of a Superman. He can never realize and feel 'other people.'"
