why are we required to pretend to like people we don't like?

This girl: i don't like her. i just don't like her. she has this thing about her that scares me. i think it's because she has this power to suck people in with her shit talking and it scares me to death. she reminds me so much of my junior high years, the people i'm forced to be surrounded by. i lie. i tell people i don't tell her off because she's my mom's friend's kid, or that i would rather not stir up trouble, which in part is true. but in reality, i'm afraid of her. why? i don't know. i don't care too much for the people she hangs with anyway. for a fact, i know i don't care what she thinks of me... maybe it's this whole junior high back lash thing. ehhh...

"I don't think i've ever met anyone in my life that can cause so much pain and be so vindictive..."