I have a guy friend who used to like me. We're still friends but he's mean to me. Why are boys mean to girls? Does he hate me?

I doubt that he actually hates you. He's just being an immature ass. I would just stay away from him till he decides to grow up. Not all boys are mean to girls, only the immature ones.

He sounds immature. Maybe he still likes you and is giving you a hard time because of it. Some guys do that and I never understood why. Girls don't respond well to it, well.. Some do.

Like Rooster said, I'd stay away from him till he grows up.

Yep, either he's so immature and gets intimidated easily, he doesn't know how to act around  girls or he is just has an abusive personality .. It's hard to say. Don't judge all boys by this guy .. I can only assume all boys don't act this way around you

Some boys may like girls that's why they are mean to them.

Sure.

You don't say your age group here but Im thinking youre still young yet. With that said, chances are he doesn't hate you but the age peer group is controlling him and youre seeing what young boys are truly like.  He has an image to protect and at this age girls usually have cooties and boys don't want to be seen with girls by their friends.  The good thing here is all this does pass in time and it will here too but a life in a young persons life changes constantly so you could have several BFs before he comes around again.  Don't sweat the small stuff in life and just move on  here and don't look back .  Good luck

He's mean to you not because boys are mean to girls but because you never took his love in. He's just angry and frustrated. One wise friend once told me that extreme love can either turn out to be true love or true hate. He just currently doesn't want to see you anymore. He'll get over it. Don't worry!

That's kind of a dumb thing to do. He's probably immature and doesn't hate you though. I have incredibly negative and traumatizing experiences with girls but I still am nice to them.