Ajeno translates to "belonging to another" or "foreign," describing something that isn't yours, whether an object, a feeling, or even someone else's love. It carries a subtle sense of distance or exclusion.
In the song, the line "Amor ajeno no es lo mío" ("Another's love is not for me") uses this word to firmly reject settling for a love that truly belongs to someone else, a declaration of self-respect.
This song is about a breakup where the singer stays confident instead of chasing after the other person. He remembers a love that once felt equal and warm, but now speaks about problems that got in the way and a relationship that fell apart.
Rather than pleading, he takes it calmly: having a drink, staying composed, and trusting that time will bring his ex back around. The chorus asks how many times she has already cried over him, and he predicts that soon she will want to come back, even if not right away.