I'm really terrible at manipulating people, I can't get people to believe my lies.
Why do you want to manipulate people? What lies have you told?
I once lied to my teacher in order to get a better mark and another time I lied about having to go to the hospital when I was in fact going to a party.
Why do you even lie, that is such a bad trait to have and very deceitful. You only harm people and destroy relationships when you lie for your own personal game.
I still do it pretty much when ever I want something.
You really need a break out of this habit. People will eventually catch on and then view you as not trustworthy. It's better to fix this sooner than later.