My bestie broke up with her bf who is my brother a few months back. We were suppose to go to a friends house tonight. And I told my mother she was going and he heard and reacted in anger like oh great. I told him you have to be able to coexist in the same room with her. He flips out about it. And starts bashing me like oh your life is so great don’t give me advice. So now I’m not going because we all were arguing and I have to stay home while he goes and she goes. The youngest siblings always get away with everything. My mother says it’s my fault and I should apologize to him this is my fault. No it’s not.