as a sith warrior, you are betrayed by a companion and you cannot kill him like you have killed hundreds for simply being in the way.
you have to either tell him everything is ok and pat him on the head or choke him as a warning.
this was the moment i stopped my sith warrior storyline. it just completely broke immersion. I wasnt my own character anymore, was made from a merciless killing machine into a sith that apparently cant kill anyone who is close to him because he is dependent upon them.