Ruée translates to "rush" or "stampede". It's a powerful and dynamic word that you don't often hear in everyday conversation.
In the song, Indila sings about a "ruée vers l'or" (gold rush). She uses this as a metaphor for her partner's frantic pursuit of success and wealth, a chase so intense that he forgets her in the process. It's a beautiful and uncommon word that perfectly captures the song's central conflict.
This song is a powerful plea from someone who feels completely invisible to the person they love. Indila sings to a man who is so caught up in his own ambitions, his own "ruée vers l'or" [gold rush], that he forgets not only himself, but her too. She sees his good heart, how he wants to offer his love, but his focus is elsewhere. She feels like she's screaming into a void, telling him, "j'ne fais que parler, parler, parler, parler de toi" [I do nothing but talk, talk, talk, talk about you] and even shouting his name "sur tous les toits" [from all the rooftops].
But none of it matters. Her efforts and her tears are useless because, as the title says, he doesn't hear her. The heartbreaking core of the song is in the line, "ça n'veut rien dire non / Non, puisque tu n'm'entends pas" [it means nothing, no / No, since you don't hear me]. She feels like she's going crazy—"j'deviens dingue" [I'm going crazy]—because the man she considers "l'homme de ma vie" [the man of my life] is making her feel like she doesn't even exist.