Dreams about attending a course often symbolize a desire for personal growth, learning, or self-improvement. The presence of your old neighbor as the teacher could indicate a connection to your past and possibly unresolved feelings or admiration you have for him. His admiration in the dream might reflect your own self-worth or the recognition you seek from others.

Wearing an abaya, which is a garment that signifies modesty and cultural identity, suggests that you may be navigating issues related to your identity or how you present yourself to the world. The fact that it keeps falling could symbolize feelings of vulnerability or insecurity, perhaps indicating that you are trying to maintain a certain image or role but are struggling to keep it together.

Fixing your abaya in the dream implies a desire to regain control or stability in your life. It could suggest that you are working on addressing these feelings or situations that make you feel exposed or unsteady.

Overall, this dream may encourage you to reflect on your self-image, your past relationships, and the ways you seek recognition and approval from others. It might be beneficial to explore these feelings further in your waking life and consider how they influence your current situation.