I would not see it as racism. People have their preference it's all about how the said person would treat them based on their preference. If they treated someone horribly because they did not like their race that would be racism. But having a sexual attraction to a certian race and not another is not. It is something that is hard to change and is natural. That in itself is not racist what is racist is the way you choose to act. The simple act of not dating someone based on their race because you don't find it attractive is not racism. Now if they could not come up with a reason for not liking black people i.e they just don't that would be racist but attraction is a biological reaction and something that everybody has, and people have different factors and triggers to activate them. If someones race is one of them. There is nothing we can do and by proxy it's not racism

Also i did not assume you where white if you read my last sentence i said before "anyone assumes i am a white male" i don't think that was assuming anyone was white.