Okay, there is a boy in my cl, and he is always bothering me and saying gross stuff to me what should i do?

Okay, first of all i am not going to use their name, so lets just say "Devin" in my cl is bothering me and always is saying VERY gross stuff to me in cl. Him and his friend "Jake" are messing around with me and making me get embarrased at recess which is in front of the whole school. I hate them both so much!!!! HELP!!!!