Need advice

Needing advice from someone who isn’t my husband. He is the only one I have to talk too. Don’t have any girlfriends. My brother disowned my sister and I for two decades now due to therapy he took and him deciding he didn’t want us in his life. She recently just repaired things with him. However he refuses to even think about speaking to me. My sister was having gallbladder surgery and she told me he said that the reason she was there was fast food and that it hurt her feelings so I sent him a text defending her. She then sent me the screenshot and he said no such thing. She had twisted the statement but is mad cause she said I was intentionally causing drama when they just got back together and I was jealous of it. She has called me every name in the book saying she hates me and I’m not innocent as I lost my temper in the process. It just always seems to be something with her. She is never appreciative of me. I had just slept in a hospital chair for her the night before and now I’m getting called a scank today. She is my twin so it’s hard to just cut ties. She said today I don’t apologize she won’t let me see my nieces and nephew. I just feel like the ultimate scapegoat and don’t know how to get out of the cycle of abuse