I'm attracted to black guys and my parents think I'm disgusting?

I'm a white girl. I'm 18. I live at home. I work 3 fantastic jobs. I go to college full time. I manage a 4.0 gpa. I don't party, drink, or smoke. I'm just attracted to black guys. I dated a black guy for 2 years in high school and the summer before college my parents told me I had to break up with him if I want to live with them and be accepted by my family. They said they had enough of my "nonsense." So I ended things with him and I was heart broken. I've tried dating numerous white guys. I even have gone out with guys my parents hand picked for me. All of the white guys are handsome, kind, and treat me like a princess but I'm just not attracted to them. I recently met a black guy who is a senior in high school. He has a full ride to college and is about to graduate at the top of his class as valedictorian. He's also playing division 1 football at a Big Ten school and is on espn's list for being one of the top football recruits in the nation. He treats me great and makes me very happy. We recently started getting more serious, but my parents don't even know he exists. I have to sneak around to see him. I like him so much. I couldn't ask for a better guy in my life. But when I come home to my family, their racist comments about things they see on television or in public hurt me badly. They used to call me disgusting for dating the boy I dated in high school and that I should be ashamed of myself. I don't know what to do. I'm not attracted to white guys like they want me to be. My parents even told me they'd rather me be lesbian. I don't do anything wrong. I follow all their rules and do everything they ask. I just like black guys. I try my best to be their perfect daughter but apparently me being attracted to black guys makes me a bad kid. How am I supposed to tell my parents I'm attracted to black guys and that I have a new black boyfriend? I can't move out because every time I've tried they take the keys to my car and my phone and lock me in my room. I'm sick of being single and dating people I don't want to date to make my parents happy. It hurts me so badly that I can't make my parents happy or proud just because I dated a black guy. I don't know what to do. I'm confused and frustrated. Its pushed me to a point of tears. I can't control this attraction. How can I get my parents to understand me?

Its not that I'm racist towards white guys, I'm just not attracted to them. I'm not eliminating them as options, but even some of the nicest and best looking white guys haven't really caught my attention. I'm not racists towards any particular race. I just am more attracted to black guys than white.