Haunted Barn(?)

So I have this old barn in my backyard that my girlfriend is CONVINCED is haunted. She always talks about the crazy nightmares she has about it and how whenever she goes inside it's like there's a presence there. 

She's pagan, I'm not so we tend to disagree on that kind of stuff but I am 100% on her side for this. The barn was there since my house was built 100 some years ago and the family that built it still lives up the road. They joke about how it was made from wood that the old hospital used before it was torn down. Better than it being an asylum, but still super creepy.

Also the windows all have this weird green film I can't wash off so it looks uber haunted whenever I go inside. 

When I was a kid my parents farmed pigs and if you know anything about pig farming that is setting up the vibes for absolute failure. I have brutal stories about what those things did in there. 

Anyway, now it's being converted into a guest house but I just thought people would get a kick out of my scary ass barn. :P