Dicha translates to 'joy' or 'bliss', but it's a more profound and poetic word than the common alegría.
It suggests a deep, fated happiness, like a true blessing. In the song, Marco Antonio Solís sings "...por tanta dicha que me das" (...for so much bliss that you give me), using this beautiful word to express an overwhelming joy that enriches his soul.
This song is a straight-up, heart-on-sleeve love confession! The singer has been holding back his feelings for a friend, and he's finally reached his breaking point. He declares, "Que ya no aguanto / Lo que traigo aquí en mi corazón" [I can't stand what I have in my heart anymore]. He's done with secrets and is ready to risk it all for a chance at romance, putting it plainly: "Yo quiero ser más que tu amigo" [I want to be more than your friend].
He really lays on the charm with some seriously romantic lines. He tells his friend that her eyes "le han dado luz a mi vivir" [have given light to my life] and even says that "en esta noche no hay más luna / Que, como tú, me alumbre más" [tonight there is no moon that shines on me more than you]. It's a bold and passionate plea to move from friendship to something much deeper, all set to a beat that makes you want to dance.