Papi points out to her that no one was ever friendly toward him, saying most made fun of him racially for sounding white and being born in America.
Typically, Cubans, Puerto Ricans, and Dominicans use the slang word and not Mexicans.
If this is a new behavior, then he likely is flirting with you.
Everyone here is willing to help.
He may view her as a friend.
Mami rose to prominence in the 2010s in mainstream culture.