beta
Seriously this sounds like one of those Reddit drama stories, with the OP’s fiance being emotionally abusive to make sure that she’s dependent on him for validation. But then one of their acquaintances lets it slip that he said he wished he never proposed to her, so OP breaks off the engagement and moves on with her life but the ex fiance takes it badly and tries to assault her new partner. And OP’s family is supportive of her, but his family/friends are enabling the toxic behavior that they are also victims of.
And all of the comments are screaming NTA and how glad they are that OP got away from that cheating, abusive bastard.