Bf mom does not accept me

So my bf and I live together. I had a good relationship with his mom and sister until now. About 6 months ago we went to visit them for vacation and it was going great until we had a big argument. He got very rude, yelling and it was super bad and he was drinking ofc and he argued with his mom and sister too. After that his mom told me that I needed to stop this and she didn't like how I let him kept yelling and being rude but the reason why I didn't is because I didn't want to cause a commotion and the way I handle conflict from other people is ignoring them and not feeding into their anger which is why I stayed silent. Also because that was my first time meeting them in person and I didn't want to cause a bad impression if I were also yelling back at him. After that his mom and I never spoke on the phone like that or texted and we used to text on a group chat, every time my bf would be on his phone and she knew I was there she would say to speak to him later, which I found it weird because she wasn't like that before, I felt like she was purposely avoiding me. She would say hi but that's about it, before we actually had more conversation and I would feel the warmth but not these months. Fast forward now she came to visit us and I cooked for her and commented that my sauce was too sweet, and today that my rice needed to cook more which I didn't think much of it until the whole thing blew up later. So I was watching TV and my bf was falling asleep and his mom came in the room and turned the light on and he told her to turn the small lamp on instead but she told him that it doesn't matter that she wanted to big light on, they argued about it and he told her that he wants to sleep and she should go to the other room because he sleeps at this time and she knows that. She didn't like that he yelled at her so she hit him and he told her that she violated his boundaries and how come she hit him and then she said that she's going to disown him and he's not her son anymore etc. She left the room and then came back and started yelling and said " i will never accept (my name) " at me saying that im disgusting, that I am a disgrace to the human race, to not show my face to her house ever, and that I was standing like a piece of shit and that her son was never like this and that he never acted lkke that with his exes. Basically insinuating that it's my fault he's like that and that I changed him for the worse. I kept quiet the whole time because I'm not the type to argue with people way older than me and i respect her. I don't agree with that because his behavior is his own fault and idk what happened to him before we met. It's very hurtful hearing those things from her because I considered her my second mom and for her to say that she will never accept me means that she never did from the beginning. His mom's sister came to me and told me not to worry about what she said to me. It's about him, not me. Ik I will get a lot of judgment about my relationship and why be with someone like that but ik my relationship and we are all not perfect, there's a lot of unresolved trauma and people act out of anger. I don't have someone to talk to about this which is why I decided to make a post. I'm not sure how to feel about this, I would not want him to have a fallout with his family because of me or if his mom makes him choose. Ik the easy way it's to just break up, I just don't want to give up on us. Ik every relationship is different, jas anybody dealt with this before?