How Do I Get My Mom’s Boyfriend Out Of The House?

Location: Pennsylvania.

I (19 F) live with my 2 younger siblings, my mom, and her boyfriend. For context my father pays all of the bills here and gives my mom money monthly for us and stuff we need in the house since she does not have a job but he doesn’t live here anymore since they split up a few years ago. My siblings and I both need my mom’s boyfriend to be kicked out. He moved in around a year ago and he is very mean. It wasn’t always like this in the beginning he was very nice to me and my siblings but now too many bad things have happened.

I’m not going to give all of the details because I do not want people finding out who I am but when they fight it gets very loud with screaming and him throwing things. He has broken my mom’s bedroom door, put holes in the wall and broken my little siblings toys among other things. He has gotten in my face and threatened to hit me. I will admit I have gotten involved in their arguments because I have heard him say things that are concerning like one time he told my mom she was going to need the cops and we have physically fought a few times. No punches were thrown but he had my mom cornered and I got in the middle and he shoved me and then I shoved him too in one instance.He gets my siblings and I involved now by asking us if we hear people ( such as my Mom and me or my one sibling) on recordings he’s taken of us around the house apparently talking about him and if we say we don’t hear anything he tells us we are lying.He is paranoid and violent and I know that at some point he may kill my mom or hurt one of my siblings. Is there any legal way I can get him out without my mom’s permission? My mom does not want him to leave pretty much. I know that sounds messed up but she and my family have been through a lot in the last few years and I can understand some of the things she has done but he can not stay here any longer. My dad has already talked to her and she said she is “working” on it but this is not the first abusive/violent man we have had here. Cps is not an option since there was already a case opened and they did nothing a few years ago and i don’t want my siblings being taken.I can’t move out yet and even if I do I don’t want to leave my siblings. What are my options? Who do I talk to? I know the cops would be someone’s answer probably but they have it out for my house we were labeled a nuisance house for a while and the neighbors call the cops on us constantly even when no one has done anything and I know that sounds crazy but it is true my mom was even going to sue them for harassment because they were following her and stuff too when she would leave the house and would pull her over for no reason. So please if you know Any legal way I can do it tell me.