Why is my family so fake?

Seriously considering cutting ties with my family. They’re all getting together for thanksgiving and I didn’t even get an invite. I’m literally the black sheep of the family and it really sucks...worse part is that they’re spending it at my half sisters who I don’t get along with at all. My mom could’ve easily done something at her house so we could all comfortably get together but no.

I’m sick of all of this I don’t deserve to be treated like this at all....