So I may or may not have released a demon that has been following my friend and I?

lesson learned. i have always warned never to play with a ouija board, so first thing is first. a ouija board is a tool, it is used to open door ways to the other side. once a door way is opened it takes a trained professional to close this door way., if you have a demon loose around your home it will take more then suggestions to get rid of it. this is not a poltergeist. as poltergeist usually is around young females. what you have is something demonic in nature, the first thing i would do is spread sea salt around your house. in every room an around the door ways, leave it there for 3 days then collect all the salt and remove from your property entirely, not just your house but your entire property, next get your self some sage an burn that ever so often, if this does not work then you need some pro help. because what ever it is will not leave with out a fight. good luck