What makes me mad

I want to talk about how it really makes me mad when someone, usually a friend, tries to annoy or piss me off. 

I have a friend that will constantly try to piss me off, I don't get it.  He will be sitting behind me in class
and like putting little pieces of paper down the back of my shirt, or by making fun of my god damn ears.  

The thing is, then when I get pissed at him, or I don't want to drive his ass anywhere because whenever he's in my car he pisses me off purposely, then after he does all this shit, he gets mad at me when I don't ever want to talk to him, or hang out with him.  

Another thing that pisses me off about him is that he can dish shit out like crazy, the paper thing, the ears thing, the shit that he does in my car, but man, oh man, he can not take anything at all. If I make like one comment about his buck teeth, or about his being 15 and not going through puberty, he cant take it at all, and it gets really annoying when he gets so mad at that kind of stuff, when usually, I don't directly show my anger  to him, I just stay pissed in my mind.  I think that he is still on that grade school, maybe even that middle school kind of mentality.  

He once told me about how he got his whole old school mad at him for talking about people behind their backs, and I can easily see that happening to him, since he does it all the time.