what movie is this?

What movie is it where there is a black kid who dosent talk whos moms a crackhead and tells him to leave the house and when he dose a man helps him out by giving him food to eat. He later grows up As a teen where he is still bullied by kids in his town. The one kid he likes punches him and the kid with dreads tells him to hit him. He then hits the kid with a chair. goes to jail then becomes an adult.....