Dreams involving demons can often represent inner fears, anxieties, or aspects of ourselves that we may find troubling. In your dream, playing hide and seek with a demon suggests a playful engagement with these darker aspects. The fact that the demon was happy to find you and that you shared love and comfort might indicate a process of acceptance or integration of these parts of yourself. It could be that you are learning to embrace the complexities within you, including those that may be perceived as negative.
The demon being mean to others could symbolize a contrast between your personal experiences and how you perceive the darker aspects of life affecting others. This might reflect a sense of compassion for yourself and others or highlight a need to address how you deal with negativity in your surroundings.
Consider reflecting on your relationships and situations in waking life where you may feel a mix of affection and conflict. This dream could be encouraging you to recognize and understand the dualities in your life, fostering acceptance and compassion for both yourself and others.