Ebullición translates to "boiling" or "effervescence." It's a vivid and less common word in song lyrics, suggesting intense emotional turmoil or a bubbling-over of feelings.
In the context of the song, Ely Guerra lists a series of her internal states: "Mi dolor, Mi pasión, Mi confusión, Mi ebullición, Mi devoción, Mi perdición, Mi corazón." The inclusion of ebullición among these deep emotions paints a picture of her inner world as a place of intense, almost volatile, emotional activity, making it a captivating choice.
Ely Guerra opens "Te Amo, I Love You" looking outward instead of in: "En el cielo se puede ver" [In the sky you can see]. The verse that follows catches her mid-change, admitting "Yo no soy la de ayer, I love you" [I'm not the one from yesterday, I love you], the English half slipped in like a confession she couldn't hold back in Spanish alone. She names what she feels as a shock rather than a glow: "Sobresalta que en mi interior" [It startles me that inside].
By the last third the song stops telling a story and just counts what's left in her: my forgiveness, my pain, my passion, my confusion, my devotion, my ruin, each claimed with a plain "Mi" [My] before it lands on the word it was circling from the start, "Mi corazón" [My heart], said again and again until the repetition does the work a sentence can't.