I think every once in a while I sincerely wish my ex would drop dead
Did your ex do something to you that makes you so angry towards them?
It's not that I really want to wish him dead, its just something morbid that goes through my head once in a while.
Maybe talking to a therapist would be helpful? If you have thoughts like this, they could eventually overwhelm you and cause problems for you.
I'm not psychopath. People do it all the time.
I don't think people have thoughts like that all the time. It's something that you have to watch because those thoughts could really lead you to a negative and dark emotional place. Try to focus on the positives in your life.