Is it okay that I wish my ex would overdose?
Why would you wish that on your ex?
I was hurt and betrayed bad and she still won't leave me alone!
No matter how much you may not like somebody, it is not right to wish an overdose on them. Wishing someone to die is about the worst thing you can say to someone.
It's fine. What's the worse that could happen?
How would you feel if she actually died? I'm sorry that your ex harmed you, but you should try and move on. Holding on to that hatred is only harming you and will negatively impact your future relationships.