Extrañe comes from the verb extrañar, meaning 'to miss' or 'to feel the absence of someone or something'. It's used here in the subjunctive mood, which adds a layer of uncertainty or desire.
In the song, the lyric "Que no me extrañe" translates to "That she doesn't miss me" or "I hope she doesn't miss me." This word is particularly poignant as it captures the emotional core of the song – the singer's complex feelings about leaving and the hope (or perhaps fear) that he won't be missed, highlighting a deep emotional conflict.
Have you ever had to walk away from a friendship because your feelings ran deeper? Banda Los Sebastianes' "Cuando Me Vaya" [When I Leave] is all about that gut-wrenching decision. The singer realizes he can't just be a friend anymore because seeing the person with someone else is too painful. He says, "debo irme a mi vida que de ser tu amigo no podÃa verte con alguien ya no dirÃa" [I have to go to my life because being your friend, I couldn't see you with someone, I wouldn't say it anymore].
It's a bittersweet farewell, where the singer acknowledges that the other person is doing well now, saying "y ahora que estás muy bien me dices ya está bien" [and now that you're very well, you tell me it's okay]. But he also hopes that when he's gone and compared to others, they won't miss him too much, and that they'll remember how much he valued them in the past. He sings, "cuando me vaya y me compare más yo solo espero que no me extrañe en el pasado y de gente ha valorado" [when I leave and they compare me more, I only hope they don't miss me in the past and from people they have valued]. He's determined to pursue his dreams, even if it means leaving this person behind, because he knows he can't truly be happy if he stays.