Why do guys try to make their crush jealous? Tell me !

dontaskwhy
Tell me...why on earth do some guys try to make their crushes jealous?

I've had some chemistry going on with this shy guy, him and I occasionally stare at each other..then look away, you know..the typical shy guy that shows signs he likes a girl.

He's in one of my classes and likes to try to get my attention by saying funny stuff out loud, he looks at me to see if I look at him.

I became jealous not too long ago because him and I saw each other in the hallway of our school, he then decided to put his arm over a chick he's not really close with, then grab her by the wrist and attempted to take her to his locker. In the end of all that nonsense he looked back at me to see if I saw what he was doing...I hated it, what was he trying to get out of that?

Why did he do that? Please help me out !
Why do guys try to make their crush jealous? Tell me !
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