How do I tell my family I lied for 2yrs about seeing my boyfriend who they forbid b/c he is 1/2 black?

Is there anyone out there who has been in my position and understands the strain I feel? I'm 20, Caucasian, financially dependent, live with my family and therefore should respect them until I am financially on my own. I fell in love and they were eager to meet the guy. I showed my family a school photo of him before they meet him and I was so surprised when they rejected him for his ancestry. I understand my family does this as a way to keep me safe from societal inequality. But I don't think they understand the pain they inflict. What law protects us from this? I'm been worried and stressed since they first took off their liberal disguises. Now, almost two years later I feel so weary from the fear of discovery and the consequences. I feel like a liar for having to sneak around, a coward for not knowing how to stand up for myself and for doing it earlier, and worst of all evil for torturing my him this way, like we're hiding him. I regret that it had to be my family to be the first to ever treat him like less of a person because of an ancestry he doesn't personally identify with. I'm so lucky to know my white buffalo, my monogamous James Bond, and after "all the great stories I tell" still wants to meet my family. What we share is worth is barricade, how do we get over it? When and how do we tell my family? After we transfer out of town? When I'm financially independent? On their deathbed god forbid? I don't want to be separated from him or my family connection.