If you leave me, I'll kill myself - The ultimate abuse of your empathy and compassion

A suicide threat is the ultimate way to control an empathetic, caring person. When you're in a relationship with someone that threatens to kill themselves if you leave, you need to follow very specific steps so that 1. You aren't stuck in that relationship forever, and 2. If they're truly serious about taking their own life, you figure out a way to help them not follow through with it.