Your dream contains several intriguing elements that may reflect your current emotions and experiences.

1. New York City: This vibrant city often symbolizes ambition, opportunity, and the hustle of life. Being there with your best friend might suggest a desire for adventure or a new phase in your life, possibly related to personal growth or changes in your relationship.
2. Mid-century modern apartment: This could represent comfort and a sense of style in your life. It might also symbolize a desire for stability or a reflection of your aesthetic values.
3. Settling into bed: This aspect of the dream suggests intimacy and comfort in your friendship. It may indicate a need for emotional closeness or support from your friend during a transitional time.
4. Jazz music: The music might represent creativity and spontaneity. It can also signify a desire for harmony and rhythm in your life. The fact that you initially did not hear it could suggest that there are aspects of your life or emotions that you might not be fully aware of yet.
5. Flooding water: Water often symbolizes emotions. The flooding could represent overwhelming feelings or situations in your life that you may be struggling to manage. Your friend's awareness of the flood might indicate that she is more in tune with these feelings than you are.
6. Removing the rug: This act of draining the water can symbolize taking control of your emotions or clearing away obstacles in your life. It suggests that you have the power to manage difficult situations and restore balance.

Overall, this dream may reflect your current emotional state, your relationship with your best friend, and your capacity to navigate challenges. It could be beneficial to reflect on any stresses or changes occurring in your life and consider how you can take charge of your emotions effectively.