How to get them to stop?

Follow one of them home. With a baseball bat. I'm dead serious too. Show them you're not one to be fcked with. Don't tolerate that. You don't deserve that. Why can't you tell someone? Tell a teacher, a principal, hell, tell the Superintendent. Make sure they're punished, so they don't do that to anyone else. I'm sure they don't realize that they're driving you to depression.