The thing is - it's not about whether you as an individual are a racist. Frankly this might sound harsh - you have to get over being hurt because someone accused you or white people of being racist. It's about recognizing (and changing) the inequalities and privileges afforded within an institution.

Here's a great link that was helpful to me even as a PoC : http://stuffwhitepeopledo.blogspot.com/2009/08/wonder-where-to-start-when-they-join.html