Protagonist and Antagonist

In my book Bud, Not Buddy the antagonist is a boy named Todd. Bud was adopted. But their lived a boy named Todd that is 12 years old, 2 years older than Bud. Todd beat Bud up in the middle of the night because he was jealous of Bud. On page 10 it says "I fell on the floor and pulled my knees up to my chest and crossed my arms in front of my head like a turtle in a shell. I started scorching toward the bed hoping I could get under it. Todd started kicking me with his slippers it they couldn't hurt as much as his fists did." That shows me that Todd is the antagonist and is trying to hurt Bud because he doesn't like him.