Why......?

ok i have a problem with this kid whos in my cl. no matter wat he won't leave me alone especially in 4th hr. hes determined that he has to work with me...he used to jus get answers but now he dont he does his own work and jus asked me questions hes always puttin his hand on my leg...(i dont like that cuz a kid over the summer always did it) and i can move his hand but like 3-4 mins later he puts it back...ne 1 have ne ideas bout wat to do cuz idk if hes jus pesterin me or if he likes me (he has a gf but idt theyll b 2gether much longer) i need to no how to get him to stop(no i wont snitch its gay)