Playing mind games and playing with someone heart is SO wrong. You want him/her tell them and do something about it... "punishing them" for past mistakes is so wrong. Case of I don't want him but don't want anyone else to have him. Don't be selfish.
Sometimes when you have been living with someone poisonous for so long, when you do finally leave, you have no idea that you have been poisoned too. And sometimes you end up treating people just like how you were treated.