My parents are prejudice...but I love him regardless.?

I'm native american. My parents only want me to date from our race. They tell me they want full blooded native american grandkids. I met this awesome guy, he's black. He treats me like a queen, very educated..good looking, well mannered. I love him. I've been with him for like 2 years, at college, without telling my parents. My boyfriend wants me to tell them but I'm afraid of what they might say. So this weekend, I'm going to tell my parents. Should I bring him along or should I tell them alone first? I thought it was just a fling but it turned serious...he wanted to propose to me but I stopped him...I didn't want to hurt him. But now I'm sure I want to marry him so I'm telling my parents about him...help!