The whole song hangs on one phrase: "to' lo cura el tiempo" (time heals everything). To' is just todo with the end swallowed, the way people actually say it. Cano and Los del Control sing it as an apology. He is hurting, "Hay algo dentro mío que me está matando por dentro" (there's something inside me that's killing me inside), and he is sorry without quite saying what for: "Si hice algo malo sin quererlo, te lo juro, lo siento" (if I did something wrong without meaning to, I swear, I'm sorry).
The verses are a sweet, slightly cocky boyfriend pitch. He'll pick her up anywhere, "aunque voy sin camel" (even though I'm going without a license; the word sung here is carné, as in carné de conducir, a driver's license), and take her for a spin "en el Mercedes-Benz". She is a bit jealous, but he swears "Motivos no te doy pa que lo seas" (I don't give you reasons to be). Then comes a deal that is really a lesson in the conditional: "Si demuestras que me quieres, yo te quiero" (if you show you love me, I love you). The chorus image is simple and nice, "Somos la Luna y el Sol" (we're the Moon and the Sun), different but equal. And the best brag in the song: "yo no te cambio aunque me haga rico" (I wouldn't trade you even if I got rich).