There is an alternative explanation. Many Asian families have a bias toward Asian marriages. My Korean friends' parents', for example, would be horrified if they married anyone other than Koreans. So perhaps your "choice" not to date Asian men is really a rebellion against the expectations for you. In which case, looking toward all other races as dating material makes you NOT racist. And that's a good thing. All you have to do is come to terms with that prejudice, and maybe yourself, so that Asian men get back into that mix (without feeling like you're doing what your parents always wanted you to do).