Adueñaste comes from the verb adueñarse, meaning "to take possession of" or "to make something one's own". It's a more active and possessive verb than simply saying "you got" or "you had".
In the song, the lyric "Te adueñaste de mi tiempo y de toditos mis latidos" (You took possession of my time and all my heartbeats) beautifully conveys how completely the person has captivated the singer. It's a strong, evocative word that highlights the depth of their impact.
This song is so sweet! T3r Elemento sings about falling head over heels for someone, and honestly, who can blame him? He admits it was "inevitable" [Era inevitable] to fall for her, especially after their first kiss. It sounds like she completely took over his world, owning his time and every heartbeat. He even says, "A life with you is all I ask for" [Una vida contigo es todo lo que yo pido].
He playfully blames her for his happiness, saying, "You are to blame because you are very beautiful, and with that smile, how could I not fall in love?" [Tú tienes la culpa porque eres muy bonita Y con esa sonrisa, ¿cómo no iba a enamorarme?]. He loves waking up with her and enjoys the "magic of her lips" [la magia de tus labios]. It's clear she brings good vibes into his life, and he's addicted to showing her that he's completely hers. He feels like she's made just for him and is here to stay, making her the sole reason for his happiness. It's such a pure, joyful declaration of love!