Fingir means 'to pretend' or 'to feign', describing the act of putting on a false appearance or showing an emotion you don't really feel.
In this heartbreaking song, Carlos Rivera sings, "No voy a fingir que no duele" (I'm not going to pretend that it doesn't hurt). He uses this powerful verb to declare that he won't hide his pain, making it a key word for the song's theme of vulnerability and honest suffering after a relationship ends.
This song is about a breakup that's happening without a big fight or a clear bad guy, which almost makes it harder. Carlos Rivera sings about looking back and wondering what went wrong. Was it his fault? "Tal vez fue mi falta de tiempo" (Maybe it was my lack of time). Or did his partner just give up waiting for him? He admits the pain is real, singing "No voy a fingir que no duele / Saber que no fue suficiente" (I'm not going to pretend it doesn't hurt / To know that it wasn't enough).
The main idea is right in the title. He keeps repeating that some things would be easier, but he's not going to do them. What's the easier way out? Getting angry. He says, "Sería más fácil odiarnos / Porque es imposible aceptarlo" (It would be easier to hate each other / Because it's impossible to accept it). Instead of fighting and blaming, he's just accepting the sad, difficult truth that they have to say goodbye to all the plans they made together. It's a mature, but very painful, way to look at the end of a relationship.