Throughout the song, we see them become closer to one another by dancing together and almost share a romantic kiss. It is also shown when the firefly reveals his love interest, and the Evening Star doesn't go by that name anymore, but by Evangeline for the rest of the film, for his sake.
Ray: Look how she lights up the sky
Ma Belle Evangeline
Louis: That ain't no fire...
Ray: So far above me
Know her heart belongs to only me
Naveen: I adore you.
Ray: Je t'aime
Naveen: I love you. I am just translating.
You're my queen of the night,
So still, so bright.
That someone as beautiful as she
Could love someone like me
Tiana: Oh no. I don't dance.
Ray: Love always finds a way is true
Tiana: I've never danced.
Ray: And I love you, Evangeline
Naveen: If I can mince, you can dance.
Ray: Ooh, yeah
Love is beautiful
Love is wonderful
Love is everything..do you agree?
Look how she lights up the sky
I love you, Evangeline