Sensing peoples emotion?

can feel emotions in a group or a from an individual without them really expressing it.i can sometimes get mood swings and realize the emotions aren't mine.II can place myself in others people shoe's for example : when my friend talks about his deceased parent , it can get to the point when i cry at night and iam not even thinking of my own parents or family member. i can just feel his pain and sadness . I normally hate emotional stuff , but this just comes automatic. It can be really great to have this ability . But i can dislike it sometimes. For example when i did something like an audition , i can fel the directors dissapointment even though he just smiled and said we will get back to you .Is this empathy ? how do you keep it controlled ,i dont want to filled with people emotions all the time.