Ladino translates to "cunning" or "sly". It's a less common word in everyday Spanish, making it stand out in the lyrics.
In the song, the artist sings, "aunque no soy un niño te lo juro yo adivino que tú serás niños ni yo seré tan ladino" (even though I'm not a child, I swear I predict that you will be children and I won't be so cunning). Here, it implies a promise of sincerity and straightforwardness in the relationship, contrasting with the idea of being deceitful or tricky.
In "Confía En Mi," Blessed sings about deep trust and a powerful connection with his partner. He wants her to stay with him, promising that "no nos van a separar" [they won't separate us]. He tells her to relax and close her eyes, because "lo nuestro estaba escrito, tenía que suceder" [what's ours was written, it had to happen].
He sees her as his "GPS," guiding him, and says that any place in the world is good as long as he's with her. He loves watching her eyes look at him, and he promises to always be there, asking, "si cuidarás de mí cuando esté enfermo" [if you'll take care of me when I'm sick]. He wants to be her "comisario" [commissioner] and her "esposo" [husband], making it clear he's all in, and he'll always wait for her, no matter where he goes.