Veemers, that's a very rude comment for your friend to make! Who you date is your business and your business alone!
I'm white and I've only dated white guys...that's just how it happened. However, I am also Jewish and except for about a week in high school, I've never dated a Jewish guy. Does that make me a self-hating Jew?
I don't think so. Would I date a black, Hispanic or Asian guy? Sure, if the chemistry was there. It's more if he's a good person and if there's chemistry, not what color his skin is.