Hmmm... Well these bullies are annoying for sure. Don't make it obvious you're so intimidated but don't act too tough. Acting aggressively will draw him to bully you even faster like a hungry whore. So yeah, act boring and uncaring, with a tad bit of sarcasm (but not too much). Show him a sense of superiority. He may take offense by this, but portray your strength without doing something stupid. It's better to have him dislike you with you in control. Make him feel stupid with what he does. It may stop him, or he may be too stubborn to quit and will feel bound to tormenting you further. In that case, rape him (not necessarily sexually).
The most recommended (by me) plan is to set up a trap. Find out when he will stay after for rugby (or whatever), and identify when he is alone. Do this after he displays some kind of depressive/aggressive mood at school. Then, when he is acknowledged as a troubled kid, approach him. While wearing gloves or mittens or whatever, make him hold your pencil real quick. Before he does something stupid, push his pencil-wielding hand straight up into his throat. Quickly leave the area, and have fun. Go play some video games or something like that.