he needs therapy to and to understand why he let himself be treated that way in his past relationship(NOT saying it was his fault or he deserves to be abused but we all have choices to make in ALL scenarios)  he had 0 sense of self and made all his worth come from his partners affection being in it i can see how it would escalate and such but your partner passing you around is not love and not something future partners would do he needs a spine and to not ignore red flags