What should i do with my best friend?

he's mad at me for posting made up stuff about him on face book that i repeatedly told him wasn't true and he hates me for calling him these names like george and franciswa and powerpuff and he thinks that im makeing fun of his name and om not and he's mad at me and everyday i told him i apoligize for everything that i said or done to you that wasnt meant to make you mad and annoy you he said that he's not my best friend forever and that i used to be nice but now in high school im not which iam and idk what to do 10 points for the best answer and i want to be friends with him what do i do.