Worst thing anyone has done to you

What's the worst thing anyone has done to you in your life?

Probably lied to me and tried it on with my sister, something I told him had happened previously somewhat so I never wanted a repeat of that. We were going out for nearly two years and he practically lied to me throughout it, and I wasn't bothered about the break up or anything, I was more bothered about the fact he lied to me about something that was important to me and knew it'd upset me if he did it, and stuff like that.

Promised me something then it Never Happened