How to face the person you hate?

It's not a suprise that some people around us acts like bitchs,or they are.The best stratage you can do by facing them,and I recommand,is not to go too deep in yours relationships,pretending you are just one of her friends.You guys say hi to each other,talk about the weather,and that's it,nothing more.Sometimes you just need to let yourself go easy with it,think less about her and be really engaged in your real friends,and you will get your suports from them.
hope it helps