I start dating boy. Couple days later my sister started dating his brother they are years older then us. My bf dad hates me I never meet him but my bf was always told I wasn’t allow in there house. His family would throw party they would invite my sister but I was not welcome. I never told

His dad I have never seen him in person he just hates me I don’t understand why. They loved my sister. They were throwing him 18 party. His brother asked if my sister and me could come. His dad throw a fit of me. My bf told him he was gonna go see me before the party his told him he left the house he was getting kicked out. I didn’t do anything to this guy but he hates my guts. It’s been 7 months my bf lives with my now and my sister and his brother are not even dating anyone. His other brother just got gf they love her. I don’t know what I did to be hated so much