Anyone think that their home is haunted, or is it just me?

We've had numerous incidents in the house, it's creeping me out.

My girlfriend once saw someone looking out of my bedroom window, I was the only person in and I was downstairs. When i'm in alone i sometimes hear whistling, I really don't like it...

There was a piece of denim on my chest of drawers and it has just slowly floated onto the floor... thats uncool!

:(