Answer:
this story is is about a relationship ending. the guy says he tired of being hurt and that he knows its dificult but its not impossible. He says he will forget her, no matter what it takes, even if it's the last thing he does. That's basically what it's about.
The story is called Te Voy A Olvidar, it's interpreted by Ariel Camacho but written by Adriel Favela