"Celosa" (Jealous) is Pasabordo pleading with a girlfriend who will not stop checking up on him. He has told her "mil veces" (a thousand times) that he has no "enredo" with anyone else. Enredo literally means a tangle, and here it is slang for a fling or an affair. "Contigo es suficiente" (you are enough for me), he insists, but she does not believe him.
The chorus has a fun bit of wordplay: "tú me llamas y me llamas y te prendes en llamas" (you call me and call me and you go up in flames). Llamas is both "you call" and "flames", so her phone calls and her temper are the same word. He also calls himself her Romeo, "esa es la neta" (that's the honest truth), using a Mexican slang word for truth. His advice is simple: people out there tell her a lot of things about him, "pero a la gente no le creas" (but don't believe people). It is a light, danceable song about an argument most couples have had, and the last line, "No me celes más, corazón" (stop being jealous of me, sweetheart), sums it up.