i freaking hate bullies

there's this one kid who sometimes will follow me home, because he goes the same way as us. he'll make fun of me, to put it lightly. i hate it, not only because this kid is being a total loser, but because my brother never lets me handle it. i swear to god, he can't let me do one thing to stand up for myself, and i'm tired of it, but i can't just fight him unprovoked, because when it would be provoked, my brother's always there, and he takes over. it's so infuriating that i can't even solve my own problems anymore, and when he gets in trouble for standing up for me, he's like "why would you say that to him" well you were the one that stood up for me, don't blame ME, this was all YOUR fault.