HOW ROTTEN RYAN TORTURED FARRAH!

Love Story brute's ugly dying regret

- 

TWO-TIMING hothead Ryan O'Neal repeatedly betrayed the late Farrah Fawcett during their on-again, off-again romance and sources dish the broken-down Hollywood hunk took that shame to the grave when he died from cancer at age 82 on Dec. 8!

"Farrah was constantly let down by Ryan," squeals a pal. "Theirs was a passionate relationship when it started - but in later years it was marked by fights and deceit on Ryan's part."

The tumultuous twosome first hooked up after the Love Story stud was introduced to the Charlie's Angels beauty in 1979 by her then-husband Lee Majors, who then considered backstabbing O'Neal his best friend!