Going (in) for the kill is the same as "dar o bote" (also take the risks), in that case is the clip in wich the guys go to rob banks and maybe other places.

    So certainly the meaning is: he hopes  the girl to understand him going to live by taking risks (in crime, that is living dangerously), it is the stronger "thesis" of mine.  

   Another possibility is about love/relationships that is all about risk vs. reward to a large degree. So, the singer could meant both at the same time.