How would you react if I told you I believe I am racist?
How would you discover that you are a racist all of a sudden?
I've seen so many bad things when I watch TV that I see in myself concerning some races.
Admitting you are a racist is the first step of improving yourself. You have to educate yourself on how not to be this way towards anyone. If you just stay being a racist without any further intervening then others will not want to be around you.
I didn't mean to be a racist, I'm trying my best.
We've all tried at some point in our lives, so you're doing great! As long as you are trying not to be racist, you are on the right path. In time, you will be totally fine.