Rant about emotionally abusive relationship

I just want to vent and ask some possible answers to this. I've been in a relationship. This relationship had a recent problem, I've made something wrong with him and he felt disrespected. The problem was me making him stay at my house then my controlling brother made him go home, I tried fighting to my brother but I got scared due to the threats. He then got mad for me being weak and I made him caught up to the problem and he had to go home. Which I understood and apologized for it then he still proceeded to insult me, curse at me and say i'm useless. I didn't react or point him out during that, he then got home, I asked for an apology for what he did and then he just ignored me even though I clearly stated that I don't want to receive another late apologies to him anymore. After not receiving an apology I talked to him clearly that I wouldn't accept his apology anymore, we then argued and he said that he would never apologize for his actions because that's what I deserved since he's just defending himself from me, but what is there to defend when I never attacked him after my wrongs? I didn't deny, I didn't justify or argued with him I lowered my pride and said an apology right away, he still continued to attack me and say the most hurtful things i could hear. I accepted those but I wanted an apology, he said he will never say sorry for it because he's just revenging too for what I did to him and he says it's just fair. I can no longer explain it to him, and asked for an separation it's hard when your partner makes mistakes but it's so much harder when they can't see it as wrong. He said he'll never forgive me for what I did to him, he also masks his hurtful words by saying "i'm just telling the truth, maybe it's true that's why you're hurt" when the words he said are I'm useless and always weak, I can't do anything and dumb. He said that he'll never change his vengeful threat that's why he'll never say sorry for it. It hurts because i'm also a very sensitive person, I grew up on an emotionally and physically abusive environment, and still now i'm here I want to get away, i'm so tired and I don't know what to do. I'm afraid that this will escalate in much worse scenario, We also had a history of him being physically abusive. I don't know why I stayed now remembering what he did to me. I can't really get help from friends and family, my environment here is also abusive. I also don't want this to be known by other people too yet.