What someone might believe is a haunting may actually be a loved one trying to get their attention. Although it can happen that a spirit may stay behind because they do not realize that they are dead or they are simply too angry or upset about something to move on, this is very rare.
One sign that disturbances could be a haunting is how they make you feel. If you are in a place and feel a lot of really heavy, negative vibes, this could be an angry spirit. Usually if it is a loved one trying to get your attention that feeling will not be part of the experience.
Try acknowledging the spirit by telling them out loud, that you are paying attention and know that they are there. This may quiet the activity, especially if it is a loved one that is trying to get your attention. If the activity continues to get worse, you may have a true haunting.