In our society nowadays, its really hard to know who's real and who's pretending to be nice. You won't come to know if the person is sincere to you or not or he/she is saying the truth or just lying to you. Some called it a "two-faced" person. It is someone who pretends to be your friend and then starts calling you names as soon as you left. Most of the things this person do is he/she acts like your friend and then talk something bad about you behind your back or they tell you one thing, and then they tell someone else something different. They're saying different things to other people in order to get their sympathy instead of telling the truth and behave honestly. It's like he/she smiles in front of you but deep inside he/she hates you. I experienced dealing with a person with this kind of behavior. It is really annoying to be with them. I had once dealt with a two-faced person, when i had a chat with this person, she said something good to me about my relationship, saying all the positive words and encouragement one can utter. Then after few days, i talked to a friend whom we both know and he said that this two-faced person told him something in the different way, this and that. I never thought that this person will be so mean to me. She even told my friend that she doesn't like me at all. I really don't have the idea why she did that to me. I don't know why such people can't directly say to someone that they don't like them, rather than wearing a mask. I think the best way is If you don't like a certain person then don't pretend that you do.