This girl from school, tapped me in the leg with a water bottle and asked for a cigarette?

she asks me for 5$, and rarely askes me for cigarettes, she tried poking me in the cafe one time, but anyway, i havent seen her for about 2 months, i seen her at the mall today, and our hometown is 3 hours away, i was sittin in the store, waitin for my sister to pick out her shoes, and i seen her walk in, she looked at me funny/awkward, i waved, she waved her hand like a foot away from my face, i dont know what she was doing, hi 5 maybe ? anyway, whats this all mean