Lol I have these two Chaldean Iraqi coworkers and they're always talking about how their families would kill them if they ever went out with a black guy. But its funny they end up sneaking around with one anyways because deep down, they love them some chocolate. I've seen some date white guys too, but their families will accept the white guys even if they don't like it. Still, not all Chaldean families are that strict from what I've seen, although most are. It's a shame how bad it is with families like yours. Black guys and Chaldean girls just go so well together. Hell, half the Chaldean girls I know talk more ghetto than black people do! Just look at Larsa Pippen, she's Assyrian and her family and kids are beautiful.
My advice to you is, make a connection with your boyfriend's family. It's clear you've already lost yours, for now at least, and you need some support. I'm sure his family will love and welcome you with open arms. In due time things will get better with your family. But if they still doesn't support your decisions by that time, then are they really your family and do they care about your happiness? Best of luck.