Short Horror Stories

Nightmare

So, this is a nightmare I had a few weeks ago, and I really want to know what it means. I looked up what it might mean, but I couldn't find anything.
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( this is the first night of the dream)
I'm at school, and I'm walking down the hallway with a friend of mine.The hallway is dark, so I try to stay right by her. I turn my head towards her to say something, and she's not there. I keep walking to the classroom, and I open the door. Four of my other friends, and the friend I was walking with are hanging form the ceiling, and they're dead. I turn to run out of the room, and there's a man standing in front of the door, holding a rope in his hand. I run passed him, and I run home.

( this is the second night I had the dream )
I go to school the next morning, and I walk into my first period class. The room is dark, and very quiet. I'm the only one in there. I turn around, and the same man is behind me again. This time, I see the rope in his hand is tied in a knot, and he walks towards me, and puts it in my hands, and tells me " they're gone, so now it's your turn"
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Does anyone know what this means. If someone can tell me, I'll tell you guys my next dream, because I've had several nightmares  lately, and they involve the same people.