I'm going to ditch my friend after he got released from school an hour earlier.
Where do you go to school?
My dumbass friend goes to junior high and said he'd meet me at the bus stop before he got out.
It's wrong to cancel plans and ditch your friends since it's rude behavior. Your friend will feel angry and upset that you left him hanging without a good excuse. If you can't meet up with your friend, you should tell him beforehand so that he does not needlessly waste his time waiting to meet up with you.
I don't even like him.
Then it is wrong to call him your best friend, then. Still, don't be a dick and ghost him.