An empath is someone who can experience another person's emotion. Or even better said: they have little control over experiencing or not experiencing.
I am an empath. I have been medicated, shocked, hospitalized, for symptoms that weren't mine. Obviously the medication didn't help.
The only thing that ever helped me staying sane and well is being able to tell myself apart from others.
It's not easy, I tell you. Until I learned the tool of muscle testing, I was at the mercy of who was around and how others felt.
Sometimes I felt so suicidal I had to hold onto the door post so I don't do anything stupid.
Today I muscle test if the feeling is mine. 99.99% of the time it isn't. Then I identify the person it belongs to. Once I really define the real location of the feeling, I am well. I still feel it, but feel it like the rain that is outside the window, and is no concern of mine.
I found a good website that says more about this empath topic