everyone's empathetic to some degree, that's human nature. when you enter a room, can you signal out a single, strong emotion, and you walk over to that person? it's not just someone sitting in the corner, someone who's acting the same as everyone else, you can feel a strong sorrow [or joy or anger] hiding just bellow the surface.
Locking down on one emotion among many denotes exceptional control. Just the fact that you sense emotion means your empathic. Try reading emotion from words on paper or a computer screen when the person is miles away from you.