Um, ok, so by "mixed guy" you mean a guy with a diverse racial background? I think if this guy can't be with you because of his racism, you are better off finding someone else anyway. But if it really just HAS to be this guy, all you can do is let him know that you're still interested if he changes his mind. But is he a lot older than you? If he's more than about three years older than you, I'm not sure this is a good idea anyway. If it were me, I would not be able to resist pointing out the similarities between racism and homophobia. But that's me.
