Rylee, it sounds like you've had a quite intense and unsettling dream. Being trapped in a fantasy world, particularly one that involves a deceitful water slide and the eerie absence of people, speaks to a sense of entrapment and perhaps a fear of being misled by those you look up to (the celebrities). The prolonged period of being trapped (7 years) could reflect feelings of stagnation or a fear of losing precious time in your waking life. The celebrities in your dream, which are often symbols of success and aspiration, trying to feed you to the slide again might indicate an underlying anxiety about the entertainment industry or public figures you admire who could, in a metaphorical sense, lead you into a situation you're wary of.
The act of running and hiding with your sister suggests a deep bond and a shared sense of protection against a threat. It's also worth noting that, despite the high intensity, the emotional level of your dream wasn't extreme, but it did leave you with negative feelings. This could mean that while the dream was distressing, you might feel a certain level of detachment or resilience in the face of these challenges.
Looking back at your previous dreams, there's a pattern that involves family, challenges, and a blend of positive and negative experiences. The party at your parents' house that turned into a game of riddles with fatal consequences could symbolize a competitive environment in your family or social life, while the birthday celebration at your grandparents' house with a rebellious yet lighthearted tone suggests a desire for more carefree moments. Both dreams appear to oscillate between a sense of connection and enjoyment and a more ominous, competitive undercurrent.
This latest dream seems to amplify those themes of challenge and threat, with the added element of isolation after emerging from the trap. It might be worth reflecting on how these themes play out in your life, particularly as a young adult navigating the complexities of independence and personal development. Are there pressures from external 'celebrity' influences or expectations that make you feel trapped? Your dreams may be expressing a need to escape certain pressures and find solace within the safety of familial bonds, represented by the presence of your sister and the house you're trying to navigate safely.