Missy - I have Gilbert's Syndrome - was diagnosed when I was 16. The whites of my eyes were very yellow and felt very sluggish. It does tend to run in families. My Dad also has it. It does not cause any ill affects, but when I have a liver function blood test, my reading is always around 48 which is quite high.
As I have got older, the whites of my eyes do not appear yellow anymore (not sure why).
Basically the billirubin in the blood does not clear as efficiently as others without this problem.