i don't what type of bullie are you facing
i am also 17 and really a skinny boy from india some student are also bullied here but like a friend
because class has unity no other class student do anything to otherclass students
well i was very-very rarely bullied i think because i have a great image of most polite student and well as i never abuse with anyone
if bullie is not that serious let it goo and you should make friends with which you can hangout like a small group they advice you the best also protect you from bieng buillied
if its a really serious bullie i really don't know what to do now , but having good friends with you are the best option in all case
you see that your friends are talking for you with them and this really can end-up this problem