I'm going to leave my ex on the sidewalk after we broke up
Why would you do this did something happen?
I was waiting for him to say something he never said.
It's understandable to be hurt by something but you shouldn't take that anger out on them. Leaving someone in a helpless position is extremely rude.
I want to be the bad guy. I want to show that people shouldn't trust me.
It is ok to be upset but you should not make such drastic moves when you are angry. Making yourself out to be the bad guy could make other people look unfavourably on you in the future.