Update : my boyfriend cut me out his life

I guess i didn't explain enough cause this is NOT a social media ISSUE its a RACIAL ISSUE. I am biracial black and mix.. my boyfriend is white ..on his facebook from 6 years ago he was filming his friends and one of his white friends called the other black friend a nig*er and no one said anything. The video was re-posted to his facebook page meaning all of his friends in the video haven't changed their attitude about that word since that original posting (6 yr ago) (And not to mention he has my family on his facebook) They are all grown men now.. my boyfriend lied and said he didn't know them and he told me "i did not say that word so what is the issue" and continued to lie to me and just ignore my messages basically crying out for him.. after all his he 'ghosted' went M.I.A. But is active on all social media and reading my past messages.. how do i deal with this.