Based on the passage, the most accurate inference is:
She became very well accustomed to life among the Americans.
This is suggested by her popularity in high school and the names her friends used for her (Jules and Hey Jude), which reflect American culture, as opposed to the name used by her family (Hoo-lee-tah). It indicates that she has integrated into American society and embraced aspects of it, even while being aware of her Dominican heritage.