Arrepentirás comes from the verb arrepentirse, meaning 'to regret' or 'to repent'. It's a powerful and emotionally charged word that isn't used in everyday conversation as frequently as common verbs like 'to love' or 'to want'.
In this song, the phrase "No te arrepentirás" (You won't regret it) is the central promise. The singer is trying to convince someone to take a chance on love, assuring them that if they do, they will not experience regret. It's a compelling hook that promises a positive outcome and makes the listener curious about the story behind such a bold declaration.
This song is the ultimate plea from someone trying to escape the friend zone! The singer is putting his heart on the line for someone who won't give him a chance, complaining, "por más que intento de acercarme a ti / Y tú nunca me has pelado" (no matter how much I try to get close to you / You've never paid attention to me). He thinks he knows why she's holding back: she's afraid of getting hurt again because in matters of love, "Tú siempre has perdido" (You have always lost). It's a direct and honest way to show he understands her fears.
Instead of just waiting, he makes a huge promise. He admits he can't predict the future, but he swears he will "intentaré / Enamorarte cada día más" (I will try / To make you fall more in love each day). He knows he isn't perfect, but he offers to be her "confidente, tu mejor amigo, el amor de tu vida" (confidant, your best friend, the love of your life). The whole song builds to one simple, powerful assurance: If you take a chance on me, "No te arrepentirás" (You won't regret it).