Loss of a ghost

I and a girl friend of mine had just walked into a small, messy library that was part of a larger building — a mansion, I think. From the door in front of us, opposite the way we had come in, the ghost of a girl in her twenties walked in and greeted us cheerfully. We'd met her before on several occasions and were friends with her. She came over and talked to us, catching up, and started reading a few magazines with us on the floor.

For some reason, though, my thought process had changed recently and I had reached an unsavory conclusion about the nature of ghosts. I wanted to, yet felt pretty scared to, test my conclusion. But I ended up going through with it...

I asked her to read some of the magazine's text aloud while I was looking away. It came out as gibberish. I asked her to recount a conversation we'd had a few minutes ago, or something we had talked about when we had met previously, but she couldn't think of anything.

I had realized that ghosts didn't have the full human version of sentience/consciousness, but rather they depended heavily on the input of the people they interacted with, and my tests seemed to confirm it.

I became very emotional. I lay down on the floor beside her and put my left arm around her and hugged her as tight as I could. I loved her for all our past interactions, knew that she had been a pleasant influence in my life, and yet I had to cope now with the realization that she wasn't exactly a real person. I had to accept that, whoever I thought she was in real life, there was little to be shown for it in her current form. I didn't want to let go of the lie.

But someone decided to destroy her anyway. She suddenly had a chain attached to her and was being pulled past me and off to the right. I looked and saw a villainous woman there among the bookshelves who seized the ghost and took her out another doorway and around a corner. She stabbed the ghost with some kind of implement, and bright light leaked out from the stab wound until... you know, like, the ethereal plane burst out in a supernatural explosion, and the ghost was gone. As the breeze from the explosion blew past me, I screamed in despair.