Extrañándome comes from the verb extrañar, which means 'to miss' or 'to long for'. The -ándome ending indicates a continuous action directed back at the speaker, so it translates to 'missing me'.
In the song, the artist sings, "Tus amigas me dijeron que estas extrañándome" (Your friends told me that you are missing me). This word is particularly enticing because it reveals a key plot point: the person he's waiting for is also missing him, adding a layer of hope and intrigue to the narrative.
Have you ever found it hard to move on from a past relationship? In "Todavía Te Espero," which means "I'm Still Waiting for You," Luis Figueroa sings about this exact feeling. He's just heard that his ex-girlfriend is with someone new, and it's not easy for him to accept. He feels like their story never truly had an ending and he's still holding on, unable to forget her kisses because he still loves her.
Figueroa is confident that her new relationship can't compare to what they had. He believes she thinks of him at night and that he holds the original "key to her heart." He even says her friends have told him she misses him too! The song is a powerful declaration of love and hope, as he waits for her to realize they belong together, singing, "Although so much time has passed, I'm still waiting for you."