Anything is possible. Have you spoken to your friend since the dream?
With the paranormal, it's a matter of ruling out things, Leenie. One at a time, until you get to the point that all obvious things, including other explanations, have been ruled out. What you are left with is the paranormal. Then you start trying to fit those pieces of the puzzle together. Sometimes we don't find out the reason for the sudden wave of activity at all. And I say wave because these things normally appear that way. They are not consistent. You may have a period of nothing, and then a period of sudden activity.
We don't know what the triggers are all the time to cause it to happen. I just want you to not be afraid of this. I've had activity life long....and I'm over 60 now. Some I know why, some I don't.