If i slap a girl on the bum and she does this what does it mean?

I'm 16 there's this girl in cl i like.She seemed to like me some time ago but now we don't talk much.But she steel looks at me in cl or teases me.Today as a joke i slapped her on the bum with a notebook.She smiled asked if it was me, sed i was dead but didn't do anything.In the next cl i messed up by reading the homework i copied from her and with that i ruined her chance tu read it to the teacher(i photo copied the entire workbook from her)and in the recess she asked for the workbook and riped all of the copied sheets.Now i think she's mad at me.Do you think she likes me?Also what should i do?