I'm sort of like that, I have 3 states of mind, one is normal, one is depressed and suicidal and the other is like psychotic, where i just wanna kill for enjoyment.
Suicide hurts the people around you severely. It's stupid to do, and it's totally counter-productive to even consider. There are far better alternatives.
I got it! Get a clone and kill him, not only will you be commiting murder, but it's also kinda commiting suicide.