my friend can't avoid his no good shitty friends

we need help.

so my friend has a bunch of friends that he's had for a long time. (we're all 13-14 y/o males)

he says he wants to avoid them but can't at all. they know where he lives and everything.

these "friends" constantly bully him if he doesn't talk about porn and shit, and call him things like "weak, pussy, and mostly a child pornographer"

is there any way we could get rid of these people forever?