Matthew Perry’s upcoming memoir won’t “sugarcoat” the “tougher times” with his ‘Friends’ co-stars. The 52-year-old actor – who played Chandler Bing on the legendary US sitcom – is set to release the tell-all tome, ‘Friends, Lovers and the Big Terrible Thing’, and it’s said to be a “juicy read” as the star dishes on the ups and downs of his time on and off the screen. A source told Us Weekly: “It wasn’t always a bed of roses for Matthew on and off the ‘Friends’ set. “And Matt isn’t going to sugarcoat the tougher times that he went through with the cast.” The insider added: “It’s not going to be…