Nope. We don't have a lot of control over our sexual preferences and is all based on upbringing during our most vulnerable time period of development. We don't have a lot of information on it, but we strongly believe there is a correlation between our times of puberty and our various fetishes and preferences (and there's a lot of evidence to support it!). It's natural to find your own race as the most attractive, it's the one you're around the most and the one with the most memorable positive experiences. Additionally, we gain a proportion of what we find attractive or unattractive in people based on our parents which means lots of people might develop an attraction for or even against their race.

There is nothing racist about preference anymore than it is sexist to only be attracted to whatever sex you're attracted to. You're not magically homophobic just because you're not gay yourself, you're not magically anything over normal preferences. There's a difference between not liking something and believing there is unreal correlations to certain groups of people. Not only is it acceptable to not like Chinese food, it's also quite normal... doesn't mean you gotta hate Chinese people for it or think less of them.

It's normal, all normal. Racism is simply believing people are below you or hating them for generalizations like all of them behave the same way, it's perfectly fine to not find their physical features sexually appealing.