Your dream presents a rich tapestry of imagery and emotions. Falling into a portal, reminiscent of Alice's journey, suggests a desire for exploration or a transition into a new phase of life. The castle bustling with workers preparing for a party symbolizes a vibrant social setting, but the moment you fell and felt ignored reveals deeper feelings about social status and belonging.

The metaphor of class division you identified signifies your awareness of societal structures and how they can influence personal identity and recognition. The warm greeting from the workers initially may represent hope or acceptance, but the subsequent indifference when you "fell" points to feelings of alienation or being overlooked when circumstances change.

Running away and eventually escaping denotes a desire for freedom and autonomy. This suggests that despite feeling trapped or disregarded, there is an inner strength and determination to break free from situations that make you feel unvalued.

To reflect on this dream, consider your current circumstances and relationships. Are there areas in your life where you feel overlooked or judged based on status? This dream could be urging you to assert your worth and seek those who appreciate you for who you are, beyond any societal labels. Embrace your journey and continue to seek environments that recognize your contributions and value you as an individual.