Just a pet peeve of mine but the correct phrase is "I couldn't care less". What you trying to express is that you care so little that you......couldn't care less. Does that make sense?
At any rate, again, you're acting like an adolescent. You couldn't care less if someone is into you or not but yet you felt compelled to complain about someone saying something you took offense to that you feel shines negatively on you. Which is racist, but that's another matter. At any rate, is there any wonder why women ignore men's advances? It's because of men like you that get all huffy puffy when rejected. Act like a man, ignore it, move on, be an adult.
My second point, why does someone need to give you anything when offering an opinion of you? There is a phrase that can guide you through this all "Perception is reality". What they perceive, is what is real to them. Whether it is right or wrong. Does that makes sense? Ask yourself this, what does it matter if she told you she thinks you're white or not? I would assume that your answer would be "it doesn't matter". If that's the case, then why complain about it? Why get all upset about it? Why go on about it? Again, maturity would lead you not to act the way you have.
By your actions and the profile picture you've chosen to use, only leads to one perception of you......you have the maturity level of an adolescent. White, black, hispanic, indian or whatever you are......you're immature.
Just an FYI, no one is 100% anything in America.