Matthew Perry's untold heartbreak has been exposed, and Kayti Edwards has shared how one haunting "regret" drove the addict A-lister to the brink. Matthew's ex-girlfriend and former assistant has opened up about her own experience with the Hollywood star's tragic death and what she believes drove him to his early grave. Kayti dated the Friends star in 2006 before going to work as his assistant in 2011 and remaining friends with him right up until his death at 54 years old.

And as one of Matthew's closest friends , Kayti has shared what she believes to be one of his biggest regrets. In an exclusive interview with The Mirror US , Kayti explained that looking back she believes Matthew's break-up with girlfriend, Rachel Dunn, whom he dated from 2003 to 2005 was a “big, big regret for him” and sparked his descent into addiction. In his memoir, he described her as "the ex-girlfriend of his dreams.

" READ MORE - Swollen hand is red flag of deadly illness that just quarter of us have heard of READ MORE - Spanish locals have secret nickname for Irish holidaymakers While Matthew has dated many A-list celebrities throughout his years in Hollywood including the beautiful and talented Julia Roberts, Gwyneth Paltrow and Cameron Diaz - Kayti felt that Matthew and Rachel shared a love that was unlike any others. And while they only dated for two years and never shared any children together, Matthew included her as a beneficiary in his will, showcasing his life-long love for her. Speaking .