I’m heartbroken and feel like I lost my mother

On the 29th of December 2024 my stepfather attacked me and I had to call the police. I have more information on my profile(sorry I don’t want to rewrite that again). Few days ago I had a conversation with my mother about what happened and what I thought about it. I said what I thought about it that it was a shitty experience and I hope something is being done about it. But then my mother said something that broke my heart: “I just hope that everything would go back as it was”. Back to my stepfather mentality abusing me and me not being able to do anything? Ever since that day I have been crying all night and mourning the relationship I had with my mother. Because I’ll have to move out because I know if I stay everything will get worse. But my mother has this mindset “that I can change him”. I’m just so heartbroken and I have to tell my mother tomorrow that I’m moving out, which is going to break her heart. My stepfather is abusive, my mother just can’t see it yet. I feel horrible that I have to leave everything and everyone behind but I have to keep myself safe. I just can’t stop crying about it.