Prejudiced parents and hidden boyfriend

HELP ?!?!?!!?!???

I’m having a bit of a dilemma. I have been dating my boyfriend for almost 4 months now. For 4 months I’ve hidden him and our adventures away from my parents because I am scared of how they will react. They are extremely prejudiced towards people of color ( African Americans ) and my boyfriend happens to be mixed. They are capable of shunning me away and giving me the ultimatum of breaking up with him or else. I am Hispanic and I am also 17 years old. I don’t know what to do because I like him so much and he makes me so incredibly happy , and happiness is not something my parents care about. Any advice? Previous experience?