I can feel the feeling of other people's which is destroying me

One of our staff just walked with a paper to our boss office then when he came out, I told him that " You have just submitted resignation letter, don't you". He was denying about it but next day he told that was resignation letter and he was amazed how I knew before he telling us. I knew because I can feel how other people's feels. Most of the time it is not beneficial for me because I start to feel according to others feeling where my own feelings is lost. I just don't want to feel anything, neither happiness nor sadness.