Anoying ghost!!!!!!!!!!?

Sounds like a legitimate haunting. Everything you describe is characteristic of a poltergeist or 'noisy ghost'. Ghosts can't harm you, they just seem to like their presence known and will play jokes on you. They have a tendency to feed off of fear, so try not to be afraid. Most spirits are not evil. The scratches on the wall are not common, but do happen. A ghost, since you made it known how it can cause trouble may turn up the heat on you by attempting to cause trouble between you and your bf. Good luck.