Yeah you dont know this guy..if he is touching you now he will be doing more latef and if you say no he want listen. Actually you need to get uncrushed real fast
My crush keeps touching my butt - I don't mind it that much, I'm just conscious a teacher will see it - but should I tell him to stop since we're not dating?
Look him in the eye and say "STOP".
Geeze .. Has society really become this complacent with inappropriate touching or sexual misconduct, that you have you even 'ask' this question?
OF COURSE YOU TELL HIM TO STOP .. STERNLY! It is not 'ok'.
Maybe it's time to raise the bar a little on who you decide you should 'crush' on .. and pick someone that offers some level of respect .. THIS guy certainly isn't. His behaviour sheds heavily on his character .. or is character not something that matters to you?