Gilberto Santa Rosa, the salsa singer from Puerto Rico, has a very simple message here: stop stalling. The title says it all, "Ahora o nunca" (now or never). He has feelings for someone, he's fairly sure she feels the same, and he wants an answer today, not someday.
He is smooth about it, though. "No te quiero presionar, ese no será mi estilo" (I don't want to pressure you, that won't be my style), he says, right before pressuring her quite a lot. His best argument is that "later" and "let me think about it" have a habit of turning into "jamás" (never ever). Time, he warns, "desaparece como la espuma" (disappears like foam). He even notices she likes him but is scared: "te gusta pero te asusta", a lovely little rhyme worth stealing.
The cheekiest line is near the end: it's better to ask a silly question than to be a fool who never asks, a Spanish saying flipped into a love argument. For learners this song is packed with imperatives like dime (tell me), atrévete (dare), contéstame (answer me) and no demores (don't delay), so you'll hear how commands work in real speech.