Girls plz help does this girl like me or what?

ok im 13 in 7th grade and this girl has been showin some signs of liking me. shes in my homeroom and we just met this year. i dont have her # and we dont talk very much. were both popular but shes a little more popular than i am. anyway she always looks at me and yells at me but shes kidding like wen i forget to do my homework shes like alex ur suposed to do ur homework! and sometimes i walk past a line for lunch and she yells "alex no cutting" and wen i look over she smiles and waves.she sits next to me in homeroom and she like takes my pencil and stuff and we have animals in our homeroom and she always says alex u like the snake more than me? awww and stuff like tht. so does she like me or is she just being friendly?