Dreams can often reflect our subconscious thoughts, feelings, and experiences. In your dream, several key elements stand out that can help us interpret its meaning.

1. Home: Owning a large and sleek home in the mountains suggests a sense of achievement and personal space. The mountains may symbolize your aspirations and desire for peace or solitude.
2. Cousin and Social Interaction: Inviting your cousin over indicates a longing for connection and acceptance within your relationships. Feeling uneasy about how to behave points to insecurities or fears about being judged, especially in social settings. This may reflect a desire to be liked and accepted by those close to you.
3. Basketball Court: The basketball court symbolizes playfulness and competition. Engaging in a fun activity like shooting hoops indicates a willingness to connect and enjoy life, but the underlying anxiety suggests that you may feel unsure about how to maintain that connection.
4. The Intruder: The presence of a burglar introduces a feeling of threat and fear. This could represent an internal conflict or an external stressor in your life that you feel is encroaching on your sense of safety or stability. The burglar's aggressive demeanor may reflect feelings of vulnerability or being overwhelmed by situations that feel out of your control.
5. Fear and Inaction: Your fear of taking action against the burglar symbolizes a struggle with confronting challenges or fears in your waking life. Standing there shocked may indicate feelings of helplessness when faced with adversity.

Overall, this dream may be highlighting your feelings about relationships, self-acceptance, and your ability to confront challenges. It could be beneficial to reflect on areas in your life where you feel insecure or threatened and consider ways to address these feelings. Engaging in open communication with those close to you may help alleviate some of the anxiety you felt in the dream.