Guys are mean to the girls they like because they don't know any better way to express their emotions. When guys begin to be mean to the girl they like they are sending up a red flag that almost always says "Hey! I like you but I don't know how to tell you!" The best thing to do is let them carry on until the guy learns another way to let the gorl they like know how they feel.
Well,i'm a guy and "You always hurt the one you love"-thats how it works.
I do that ALL the time. It's just a way that i use to show my feelings towards people. But i ended up in high school being enemies with the only girl i loved. It only happened because i started to tease her,i didn't know what else to do i wanted to be friends with her but it's something that i may have caught of some of my friends i guess. Girls can just sometimes get the wrong intention:) As we get older guys relise what they have done,try to change it because of being more mature. It happens a lot..it's nothing new :)
I'm a guy and I don't express my feelings to girls that way,I have a different way of expressing it.so not all guys are "mean" to girls they like.I guess the reason some guys do that is to get the girls attention or express their feelings for the girl because some guys..just have no other way to express their feelings but through that way.