Capricho translates to "whim" or "caprice". It's a word that describes an impulsive, often unreasonable, desire or action.
In the song, the lyrics mention, "traiciona su mejor amigo somos por capricho seres" (betrays his best friend, we are beings out of caprice). This highlights a theme of betrayal driven by selfish or fleeting desires, making it a key word to understand the song's emotional core.
Have you ever had a friend who betrayed you? "El Mejor Lugar" tells the story of someone who trusted a friend, only to be betrayed when that friend got involved with their girlfriend. The song opens with a phone call where the friend is asked to pick up the singer's girlfriend as a surprise, setting up the eventual betrayal.
Our singer then describes how he confided in this "friend" about everything, only for the friend to use that trust to get close to his girlfriend. He sings, "mientras el yo de ti mil cosas yo de ti a él le platicaba" [while I told him a thousand things about you]. The singer feels the pain of this betrayal deeply, lamenting that his girlfriend chose his friend over him. He admits he's not doing well alone but hopes to find someone who truly loves him and sees him as "el mejor lugar" [the best place].