ex best friend...

so i was friends with this person since preschool. things started to change in junior high and then high school we went our separate ways.. I started hanging out with another crew of girls and so did she. Well i'm 23 now and her too. My family knew about her because she attended so many birthday parties of mine. So til now they say hi and whatever .. my mom always keeps talking about her.. Were not friends anymore because she changed and left me for some white cross country girls (because she's white) while i went with latina chola girls (because im mexican).. I just lost respect of her ... so i don't talk to her anymore since like 15 years ago.. it's just so annoying when my family talks about her to me like shut uppppppp we aren't friends anymore.. they can't respect that.. How do i tell my family don't have any contact with her????! my mom has her on facebook and her brother 😡😒😒😒ugh ...