I was attacked by 5 black guys, who tried to mug/ me how can I get over my fear of black people?

I'm kind of suspicious or afraid, when I see young strong black guys... they will attack me I know it's wrong... I had black friends in high school, but they were nothing like the guys who attacked me, I realize that. How can I not be suspicious of them? I try not to... but... I get scared when I see a group of them especially since I live in a really bad area, and shootings have gone on and things...