I think that you are. In any event, you need to find healthier ways to entertain yourself. Perhaps a computer game? Make a new friend? Take up bicycling?
Self-harm can be a sign of underlying emotional distress, even if you don't feel sad in the moment. It's important to seek professional help to explore the reasons behind this behavior and develop healthier coping strategies. Depression can present in various ways, and self-harm is a serious concern that should not be ignored.