I used to hate doing this nor I want to do this. Sadly in this world most always you has to have double face. No matter what your real feelings to the particular person put your best face on them. You never know (God forbid) you need them one day or worst they can make your life miserable such as they become your superior or know someone that can screw you on later day. Sucks huh yeah who said life is fair anyway!!! Best I can do is put up neutral face and try to get a better friend than the person so instead I can screw them hehehehe...