I'm sorry. [He's stiffly closed off, yet the sympathy is as close to genuine as he ever gets. Being trapped somewhere with a ghost or something very much like one, of someone you've gotten rid of once and simply don't want to have to deal with ever again. Unpleasant doesn't even begin to cover it.]

I imagine there'd be some other way to handle it. What I was saying before though, about other alternatives. What you're describing sounds like it could just as easily be a hallucination or waking dream. Maybe he isn't an actual spirit, but the result of an environmental effect, or something else that's playing tricks on your mind.