In interpreting your dream, there are a few key themes and symbols to consider:

1. Public Spaces and Isolation: The setting of a show where you feel alone suggests feelings of isolation or being an outsider in social situations. This could reflect your current feelings in waking life, possibly indicating a desire for connection or a sense of not fully belonging to a group or family.
2. Toilets and Privacy: Toilets in dreams often symbolize the need for privacy, self-reflection, or the release of emotions or thoughts. Your awareness of being seen while using the toilet may indicate feelings of vulnerability or anxiety about how others perceive you. It suggests you might be dealing with a situation in your life where you feel exposed or judged.
3. Connection with Family: The second scene with your sister indicates a desire for support or understanding. Discussing insomnia could symbolize underlying concerns or stressors that are affecting your peace of mind. Your sister's question about your ex-boyfriend's birthday may reflect lingering feelings or unresolved issues related to that relationship.
4. Ex-Boyfriend's Influence: The presence of your ex-boyfriend in the dream signifies that there may still be emotional ties or unresolved feelings connected to that relationship. This could be affecting your current state of mind and possibly contributing to your feelings of insomnia or restlessness.

Insights and Advice:

• Consider reflecting on your current social connections and whether you feel supported by those around you. If feelings of isolation persist, it might be helpful to reach out to friends or family for support.
• Explore any unresolved feelings regarding your ex-boyfriend. Journaling or discussing these emotions with someone you trust may provide clarity and help you move forward.
• Prioritize self-care and find ways to manage stress, which might help with sleep issues. Techniques such as mindfulness, relaxation exercises, or establishing a calming bedtime routine could be beneficial.

Dreams often serve as a mirror to our internal state, and by examining these symbols, you can gain a deeper understanding of what you might need to address in your waking life.