my ghost friend! HELP

He is usually very quiet, doesn't move anything but last night I heard a cabinet shut in the kitchen.. I blamed it on our new neighbors, it was after 1am. This morning I'm in the bathroom and I hear the fridge door open! The door to our fridge always shuts by itself, the door was staying open like someone was holding it. Right when I started to walk towards the kitchen, the door started to close. My husband works nights and swears I'm crazy because he has never seen our little ghost friend. 

I catch our dog looking into the kitchen/dining area all the time. Sometimes the hair on his neck will stand up 🤷🏻‍♀️

Tell me some stories or give me advice!!