Peter Strauss and Victor Slezak are Sigmund Freud and Carl Jung in Primary Stages’ revival of “Sabina” by Willy Holtzman.Marin Ireland plays the title character, Sabina Spielrein, the young woman who was Jung’s patient and lover. Holtzman has called his drama “a triangular love story of unrequited love.” Primary Stages first presented “Sabina” in 1996. The revival runs Feb. 2-27, with previews beginning Jan. 18. According to reports, the script has been much revised from that original production. Ethan McSweeny directs.