Confidente translates to "confidant", a person you trust with your deepest secrets. It is a more intimate and specific term than just 'amigo' (friend).
In the song, the singer expresses the pain of being in this role. He sings, "Fui tu confidente el que secretos más sabia de ti" (I was your confidant, the one who knew the most secrets about you), revealing his struggle of having fallen in love with the friend who trusts him with everything. This single word perfectly captures the song's central theme: the difficult transition from friendship to love.
Have you ever fallen head over heels for your best friend? That is the exact mess Felipe Peláez and Maluma are dealing with in "Vivo Pensando En Ti". The narrator knows he is playing with fire: "pongo en riesgo nuestros días de amistad" ("I'm risking our days of friendship"). For a long time, he was perfectly happy being the listener who held all her secrets. Then his feelings went rogue. Now, being stuck in the friend zone actually hurts: "el papel de amigo y confidente me dolió" ("the role of friend and confidant hurt me").
Instead of bottling it up, he confesses everything with a mix of sweet romance and zero filter. He describes catching feelings as his only slip-up: "En nuestra historia solo hubo un mínimo error / Ser tu confidente y meterle el corazón" ("In our story there was only one tiny mistake: being your confidant and throwing my heart into it"). Maluma cuts straight to the chase with a cheeky compromise, suggesting, "Podemos ser amigos solos en mi habitación" ("We can be friends, alone in my bedroom"). Between Peláez's heartfelt vallenato melodies and Maluma's flirtatious urban swagger, the song turns a terrifying confession into a catchy party about crossing the line from buddy to lover.