Why does my boyfriend get mad at me, but he does the same thing?

Boyfriend(boyfriend)

This is long but I really need some advice..

So, my boyfriend and I have been dating for 3 years.. And he gets mad if I talk to guys, or say hi. So I completely ignore them. But I get mad to if he talks to girls. Just the way we are..

But, I never talk to guys anymore. If they say something to me, I just ignore them.

Himmm on the other hand. If a girl says something to him, he’ll answer back

Even if its a girl he used to mess around with when we first started dating.. Today at school, one of those girls he used to mess around with. ( also, this girl and him used to really like eachother when we first started going out. I guess they quit talking tho obviously. A few months ago, my boyfriend best friend “started a rumor” just to get a prank at my boyfriend..this was the rumor: my boyfriend and this girl made out and almost had sex at his house.. Everybody at school said that she was saying it was true. But when I asked her, she said it was my boyfriend bestfriend who started it. Everybody in the school knew about it. But, I got over it eventually.)

Now, she tries talking to him by saying “whens the game tonight” or, “do we go outside during lunch” or random crap like that. And when she asks him, she looks at me. But, he smiles and answers back. If I did this, he’d flip out so bad and not talk to me for a while.

I get mad when she does this.. But should I? And what am I supposed to do? I’ve tried talking to him about it, but he just gets mad at me.

Im not sure what to do. Do I have a right to be mad?