'Bold and the Beautiful': Tracey Bregman's Boyfriend Claims ... Her Son Wants to Kill Me

"The Bold and the Beautiful" star Tracey Bregman is in the middle of an intense legal battle between her son and boyfriend ... and the bf says he's scared for his life.

According to legal docs obtained by TMZ ... Bregman's boyfriend, Brian Landow, got a restraining order against her 19-year-old son, Landon. Brian says Landon pulled a gun on him and has threatened to kill him multiple times -- this is all because he and Tracey have tried to put an end to Landon's out-of-control partying.

In fact, according to Brian ... Landon hates him so much, the teen hatched a plan straight out of a soap script to sabotage mom's relationship -- hiding panties in Brian's car and dumping cocaine in his coffee.