Is there ANYONE here that believes this is paranormal activity, or am I just crazy?

Well I'm thinking you have something following you. Or your just being paranoid. I believe in this paranormal thing and I think it's interesting. Maybe your dog saw something that she didn't like animals are more sensiteve to the paranormal than we are. Your friend maybe telling you the truth. Listen to him more see if he knows anything you haven't told him. There's a site I go to and people talk about these kinds of things all the time. Here is the web site maybe you might want to check it out some time. www.yourghoststories.com. Hope this helps.