Odd dreams

[FONT="Century Gothic"][B]I've been having weird dreams recently. All of them involving friends I see regularly, and my boyfriend too.

This is one from 3 nights ago,
of which I surprisingly got sleep :
We were in a large house. It was a stormy night, the lights flickered on and off, then finally gave in, and shut off. I was at the top of the stairs, looking around, trying to feel my way. My friend, Jess, and Ryan were there. But, someone else too. This girl with long black hair was standing with them. But, Jess didn't do anything, nor did they run. She pulled out a knife, and stabbed me right in the heart, causing me to stumble all the way down the long flight of stairs. I then, came back to life, with blood dribbling from my mouth and said "Why did you kill me? I thought you were my friends.."..I then awoke scared.

Now, I'm not sure why this has been happening. Does it mean something? Is something or someone trying to tell me something? Or am I just getting too over worked over nothing..
I'm not sure myself.. :/[/B][/FONT]