This poem is very beautiful in Spanish. When you say, "Lo siento por querer darte lo mejor de mí, (I'm sorry for wanting to give you the best of me,)
Aun sabiendo que era algo suicida. (although I knew it was something suicidal,)
Por querer lo mejor para vos, (To want the best for you)
Y olvidarme de lo que era lo mejor para mí." (and to forget what was best for me)...
That really got to me - very emotional! Well done. I hope you will keep writing poetry.