What does esperanza mean when she tells miguel that they are on different sides of the river

Miguel says this to Esperanza after Papa’s death. Esperanza's family was rich and from a higher class than Miguel's family. They were figuratively and literally far a apart in their socio-economic status. By the end of the story, Esperanza accepts Miguel and they stand on the same side of the river.

It means that they are apart from each other.