There is an illness called being a chronic liar where you actually can't help it. I used to lie a lot when I was younger but very stupid lies. For instance my friend asked me why I had stopped using my brown tobacco papers and I said "I left them at home" knowing they were in my pocket... No one got hurt but I couldn't control it... Seems to me that this boy has the same problem. You have to work on this and a good practice is to tell the people you lied to immediately when you realized you told a lie, that you were not telling the truth and the truth is... It's very hard but it really helps... Good luck in life and remember the truth is always best