Dream of hands

My fiance and I are driving back jome from dinner, when we arrive home there is someone sitting on the front porch. As I get out to investigate he is beside the car. He then drags my fiance out, the figure is wearing a long coay and I can never see his face. I hit him and he releases my fiance, she runs to the saftey of our home, she is out of harms way at this point. I continue to hit him, again, and again. He never falls, never stumbles, but never fights back. This sems to o on forever, then I wake. My hands are aching and I can barely move them from having them clenched so tight. I have had this dream 6 times now over the corse of about a month please help