why does esperanza comment on the boy watching her dance ? How does this reperesent a shift for esperanza?

In this chapter, Esperanza sits awkwardly at her cousin's baptism party because her brown school shoes do not match her pretty new pink and white party dress. She notices a boy staring at her which makes her feel good. Convinced by her Uncle Nacho to finally dance, Esperanza finally loses her shyness and feels like a woman under the admiring gazes and clapping hands of the party. This is very much a coming of age moment for Esperanza.