WHAT TYPE F DISORDER DOES HE HAVE?

Billy Bibbit: A nervous, shy, and boyish patient with an extreme speech impediment. Billy cuts himself and has attempted suicide numerous times. Nurse Ratched is a close friend of Billy's overbearing mother, who treats him like a child, despite his being in his thirties. To alleviate Billy's fear of women, McMurphy sneaks a prostitute into the ward so Billy can lose his virginity. Upon being discovered the next morning, Billy speaks for the first time without stuttering. It is only after Nurse Ratched threatens to tell his mother that Billy reverts back to his nervous ways. Fearing the loss of his mother's love after hearing Ratched's threat, Billy has an emotional breakdown and cuts his own throat.