Reoccurring vivid Nightmare. Please Help!!

[dreamingtilforever]

I keep having this nightmare where I get kidnapped. I'm at some guys house and I'll try to escape but then he'll grab me and drag me back in to this creepy old house that has like 6 different levels. Then I'll try to knock him unconscious. I repeatedly hit him over the head with a big glass bottle until the bottle breaks, it doesn't effect him at all. Then he grabs a golf club and tries to hit me but I grab it from him before he can. With the golf club in my hand we have a conversation about how I want to kill him for doing this to me and he tells me I should kill him. I then repeatedly hit him over the head with a golf club using as much force as I can and nothing happens to him, he just stands there. I keep hitting him hoping something will happen, after what feels like 20 minutes of hitting him over the head he pretends to be knocked unconscious. I drop the golf club and run as fast as I can down two flights of stairs. Once i get down the first flight of stairs he peers over a balcony and looks down to me. I hysterically yell and start crying and say "you won't die!" he yells back with an extremely creepy smile on his face and says "you're right I won't". I finally make it to the door to run away. I get outside and see leaves all over the ground and a driveway that leads to a road, I see a car in the distance and start to run towards it. I look back and there he is chasing me. And then, I wake up. I don't know why i keep having this dream but it has made it very hard for me to sleep. Please help me understand it. The man looks like Ian Bohen from teen wolf

Thanks,
dreamingtilforever