Why am I so obsessed with black women?

I'm a white male in his mid-twenties, currently going to university, and I don't know what it is but I've always been insanely attracted to black women, probably starting in high-school. It seems like all society seems to project and push is the white female-black male relationship. My girlfriend is white, but that's honestly just a matter of convenience and upbringing. Now that I'm in college in mid-city, I'm exposed to black girls on a daily basis. I used to watch BET just to see Erikya Badu or Foxy Brown or Lauren Hill. There's more than one super sexy black girl in my class and my heart palpitates whenever even look at them. What the hell am I going to do?