I dont get it .......Boy Trouble Help?

my name is filomena.i am 13 yearz old. the story is that about 2 months ago a oy named lance made a joke on me he made believe that doing the computer was true but is was a joke.....and last week i recieved a note and he told me that he likes me alott so i told him i didnt believe it andi like him too but i think that he is lying that he likes me and also he rubbed his legs against mine...i was gonna flirt bak but it was too late becuz the teacher moved our desks ...i didnt tell him that i like him cuz it might be a joke.......so wat should i do?