Dreams about school often represent personal growth and learning experiences. The setting resembling Hogwarts suggests a desire for magic, wonder, or creativity in your life or perhaps a longing for a sense of belonging and community.

Being with your girlfriend in the dream and enjoying intimate moments indicates a strong emotional connection and affection in your waking life. This part of the dream reflects feelings of happiness and fulfillment in your relationship.

The prank about your dog being missing introduces an element of anxiety or fear of loss. Dogs often symbolize loyalty and companionship, so this aspect of the dream could indicate concerns about your relationships or a fear of losing something or someone important to you.

Overall, this dream seems to highlight the joy you find in your relationship while also touching on underlying anxieties regarding attachment and security. It may be beneficial to communicate openly with your loved ones about any worries you have, as this can help alleviate feelings of uncertainty.