Sometimes I have a feeling that I don't even know who I am . Especially when I am talking with different people on the net , when I am looking on the chat I finding out that every person has conversation with different kind of me , me with different personality , me with different mood , me with different mask. After that I feel some guilty , in my mind from somewhere comes an idea that I'm liar and I am lying with everyone . At that time I come up with a conclusion that I don't even have a real personality and I am variable just like a X in equations x=y , when Y changes the meaning of X also changes , but I want to be a constan and stable. At last all this thoughts lead me to the feeling of depression and melancholy.