You are absolutely wasting your time. Why be with someone who openly tells you that he prefers to date other types of women? Did you know this going in, or does he casually bring up his Asian fetish ever time you guys go out for sushi?
Clearly he doesn’t just date Asian women, seeing as how he’s with you. But the fact that he’s talking about other women is a sign he doesn’t consider you a long-term prospect. Who cares if he’s missing out on something else. YOU’RE missing out. You are with a guy who openly tells you that he prefers women who are not you. That’s not a guy to feel sorry for– that’s a straight up douchebag.
Dump him. Let him go entertain his kind of racist Asian fetish. Anyone who says they prefer to date one race is boring and lame.