I am 13 and I like this guy who is mean to me and I am mean to him.so basically we both hate each other.but I asked my friend 2 ask him if he likes me,and he said yes.b/c he said I was nice and pretty.could he like me?he 13 too.

Yes he could possibly MAYBE like you. Sometimes boys will treat you mean either to get your attention or because they don't know how to deal with their feelings of liking a girl or
He may feel that he needs to hid his feelings by making them look the opposite of what they are.

What is it with kids today, your only 13 and you have a long life ahead of you so why worry about this yet??