Your dream appears to weave together themes of family, work, and transition, which may reflect your current life circumstances or emotions. Let's break it down:

1. Family Gathering: The summer backyard with a kiddie pool suggests a sense of comfort and nostalgia. It may indicate a desire for connection and joy in your family life. This setting could symbolize warmth and happiness, but also the responsibilities that come with family gatherings.
2. Work and Your Boss: The presence of your female boss suggests that work-related themes are significant in your subconscious. Perhaps you are feeling the pressure of work commitments or are contemplating your professional relationships and responsibilities.
3. Sister's Fall: Seeing your sister lying at the bottom of the stairs but conscious may symbolize concern for her well-being or reflect your feelings about family dynamics. It could also represent a situation where you are worried about someone but are reassured that they are okay.
4. Winter and Closed Amusement Park: Transitioning to a winter scene indicates a shift in feelings or circumstances. Winter often symbolizes coldness or dormancy, perhaps indicating a period of reflection or a pause in your life. The closed amusement park rides might represent lost opportunities or a sense of stagnation. However, your escape through this area suggests a desire to move away from constraints and seek freedom.
5. The Locked Metal Gate: The high locked gate at the end of your dream could represent barriers or limitations you feel in your life. Successfully passing through it indicates a desire for liberation and the need to overcome obstacles.
6. Commitment for Someone: Your feeling of commitment might be linked to the responsibilities you perceive in both your family and work life. This could reflect a sense of obligation that you are grappling with, and your dream might be encouraging you to assess what is truly important to you and how you can achieve a balance.

Overall, this dream seems to suggest a journey through personal and professional obligations, with a strong emphasis on the need for connection, balance, and freedom from constraints. Consider what steps you can take in your waking life to address these feelings and find a sense of relief and fulfillment.