Me diste en la torre is a fantastic slang expression that literally means "you hit me in the tower". It's used to say someone has defeated you, messed you up, or completely knocked you down emotionally.
Often linked to the game of chess where losing a tower (rook) is a major blow, this phrase vividly captures a feeling of total devastation. In the song, Feid uses it to express the immense pain and heartbreak his ex caused him, making it a powerful and memorable line.
This song is one big, satisfying "it's too late" to an ex who suddenly reappears. Feid sounds completely surprised to see her, singing, "Se siente extraño que tú estés aquí" (It feels strange that you are here). He reminds her of all the pain she caused, how he gave her his heart and she "lo desperdiciaste, me pagaste con dolor" (wasted it, paid me with pain). He's not holding back at all.
He's totally moved on and tells her that being without her is "lo mejor que me podría pasar" (the best thing that could happen to me). He even gets specific, calling her out for keeping the expensive jewelry he bought her and not calling when she went to Italy. He admits they were great in one area—"chingando éramos los mejores" (in bed we were the best)—but that's not enough to fix things. His final advice to her is pretty blunt: "Yo te recomiendo que te acostumbres a no estar conmigo" (I recommend that you get used to not being with me).