Dreaming of your exes appearing in a setting like Mexico can hold various meanings. Here are a few interpretations:

1. Nostalgia and Reflection: The presence of your exes might indicate that you are reflecting on past relationships and experiences. Mexico, being a vibrant and culturally rich place, could symbolize a longing for adventure or the emotions tied to those past relationships.
2. Unresolved Feelings: Seeing multiple exes could suggest that you have unresolved feelings about these past connections. It might be a sign to explore what you truly feel about them and how those feelings impact your current relationships or emotional state.
3. Social Dynamics: The outing aspect of the dream may represent feelings about social interactions and relationships in your life. It could indicate a desire to reconnect with old friends or a sense of being pulled back into social circles from your past.
4. Change and Transition: Mexico could symbolize a new chapter or change in your life. The presence of your exes may indicate that you are transitioning from old relationships to new ones, and it’s important to acknowledge those past experiences as you move forward.

Consider how you felt during the dream and any specific interactions with your exes, as those emotions can provide further insight into what this dream means for you. Reflecting on your current life situation and any changes you are experiencing may also help clarify the dream's message.