I know what you mean. I also can FEEL people. I can tell when someone is about to go through something or if they are I can feel their pain. Right now at my job there is a lot of tension between management and some employees. There are also marital problems and of course money problems and I can feel all of their pains.
This is really draining me physically . I do not know how to separate myself from them emotionally.
As far as letting people "know about themselves". I would not go there with a ten foot pole unless I had total trust in that person and if I felt they really wanted to know.