It means to do things that are sneaky and wrong. This attitude by some women started long ago when Eve asked Adam to have a dark side and eat the forbidden fruit.
Stick to your own way, it is probably better than hers.
It sort of tells the girl that you like her back.
She does not like him
it definintly does
it means he trusts you he might like you
It could mean the girl finds him to be caring, and could even like him.
that mean they don't like him
It probably means that she would like to kiss you.
it means that she thinks that you like her and she likes you to
He likes the girl he kisses unless it was an he didn't mean to kiss that girl. or he likes the girl he kisses and lies and says he like someone else
He really likes you!!!!
They are most likely talking about themselves liking you.
It means that they are only playing you. They are only taking advantage of you liking them.