It could be one of the signs of body language of making a move on you. So, if you like her back too you can make a move on her like she did with you. If you don't you have to surprise her and friend zone her to let her down easily so that way she won't think of being hurt or even being hatred or mad at you for doing that to her.
It means:
A)She wants to be comforted if shes sad.
or
B) She wants to cuddle with you.
Then he has a thing for you girl.
She likes you.
no it means hes a player
It means he likes you.
A girl LOVES it when a guy puts his arm around her and says 'I love you.'
She may be ready to be more than friends.
It means his arm is tired and you're the closest arm rest.
If your a girl that's a good thing, if you're a boy then maybe not so good.
It's a hug, isn't it?
I know that it is kind of gross but a girl puts her hand on the guy's waist or in his back pocket.
It could just be a friendly thing, or it could be because she likes you. I wouldn't ask her unless she shows other signs though.
Of or involving the arm and the head.