Brad Pitt is “dating, but not seriously”. The 58-year-old actor was reported earlier this week to be dating Lykke Li but insiders have dismissed the claims that he and the 35-year-old singer have taken advantage of the fact they live close to one another to enjoy an under-the-radar romance, and maintained the pair are just friends. A source told People magazine: “[There is] a large group of artsy friends that he enjoys hanging out with. “Lykke Li and Alia Shawkat are part of this group. He likes having female friends too. “He is dating, but not seriously”. The ‘Once Upon a Time in Hollywood’ a…