Dreams about time travel often signify a desire to revisit past experiences or relationships, particularly those that hold strong emotional significance. In your case, going back to date someone you considered the love of your life suggests a longing for connection or unresolved feelings from that relationship.

The game element, especially with high stakes reminiscent of "Squid Game," may reflect feelings of anxiety or pressure in your waking life. The shared life aspect indicates that your relationships may feel intertwined with your personal well-being, suggesting that you might be concerned about how your actions affect those close to you.

The dancing challenge can symbolize vulnerability, as dancing often requires a level of openness and coordination with others. Your fear of losing in this challenge may represent feelings of insecurity or a fear of failure in your personal relationships or endeavors.

Overall, this dream might be prompting you to reflect on past relationships and how they influence your current emotional state, as well as encouraging you to confront any fears or pressures in your life. Consider what aspects of your past you'd like to revisit or what changes you might want to make to feel more secure moving forward.