This one starts with the saddest kind of honesty: "Lo intentamos, pero no pudo funcionar" (we tried, but it couldn't work). The singer doesn't blame her. He owns it straight away with "Yo hice las cosas mal" (I did things wrong) and "Yo sà me enamoré" (I really did fall in love). That little sà is doing a lot of work: it means "I, at least, did," and it stings because she told him "que no sentÃas nada por mÃ" (that you didn't feel anything for me).
The chorus is where it gets funny and sad at once. He asks "¿Qué voy a hacer cuando tenga ganas de darte un beso?" (what am I going to do when I feel like kissing you?) and answers himself: "Será muy tonto hacerle caricias a la pared" (it'll be really silly to caress the wall). Great image. Then the drama kicks in with "Me moriré cuando te mire besando a otro" (I'll die when I see you kissing someone else). Listen for chula and chiquitita, two very Mexican pet names, roughly "gorgeous" and "little one," and the band name-checking itself with "Asà suena el amor de la calle" (this is what street love sounds like), a pun on their name, Calle 24.