Ofcourse he did hurt her with that line but Aryan ka POV bhi bilkul sahi hai She listened to his one talk jo usse nhi manani chahiye thi, Usse chod ke jana nhi chahiye tha, she should have stayed, jhagdti usse, chod ke kyu gai😔
Arpita didi was the voice of reason that day ki koi bhi tumhe tumhare ghar se nhi nikal sakta
And aaj tak Imlie ne iske pahle Aryan ki konsi baat mani hai batao mujhe toh yaad nhi hai bilkul wo ek baat jo nhi sunani chahiye thi wi hi suni usne
I don't think she left because he asked her to leave. If I remember correctly, he screamed "then bloody leave" but that didn't make her leave. Instead when he punched the wall and hurt his hand, she rushed to tend to him. But then he framed it like her presence will cause him even more pain. That, IMO is why she left. The idea of causing him even more pain on top of what he was going through had to be unbearable for her. I don't think she knew she had the choice of staying and fighting with him like they always had done.
I also think that she had believed that he would stop her from leaving till the last minute. I don't know how long had passed between their fight and her leaving. Was it mere minutes or was it hours? But he didn't stop her and she gave him that heartbreaking last kiss (was it the last ditch effort to get him to stop her?) and then, finally she left her home.