Let me kno if you think im right...and things i can do to mess with her head ?

There is this girl in my math and lunch cles. at the end of cl she comes over and lays on my desk...with me still in it! when she stands up she inches her feet over to mine. then at lunch i usually sit across from her and she plays footsies with me or stretches her feet across to my side of the table. she said that we have a love hate relationship and smiled at me. i make jokes about her all the time and she pretends to pout and then she pinched me and smiled... does she like me and cause im not single what can i do to mess with her head to make her think im in to it?