A girl is always hitting me what does that mean?
This might not have any unique meaning other than normal friendship. However, if there are other interactive signs like stares that she produces as she hits you, then it might mean that she likes you a lot.
It means she likes you but pretends to be mean so that you won't know her moves
She likes you.
That means you're both under the age of 9 or, she doesn't like you.