Look - the family members ARE there for you. the family members barely talk to you simply because you STAY WITH HIM. They probably have tried to show you that staying with him is detrimental in too many ways to list here, but have failed, and have simply given up trying and have thus withdrawn. As soon as you tell them that you want to get out, they might very well help you.

If they indeed have tried to help you see that you are being a victim of abuse, then, to increase your chances of getting help from them, I would start by telling them that you appreciate their efforts and realize how awful they must have felt seeing for themselves that you are in deep trouble and yet being unable to get their point across. Express your gratitude first, then state your intention to leave, and then ask for assistance.

Keep us posted! Good luck getting out and back into the world that respects you!