It is always privileged white folks who think african americans are over reacting or imagining racism. Your feelings are valid. You were the one who was there so you would obviously be the best judge on what went down. I mean, really. How can anyone tell you what did or didn't happen based on a fucking post they read. Seriously.

He may be affected by anxiety. People who are lonely may come to such events but be uncomfortable with physical contact. He might have been shaking hands with people he already knew. Or he could have been a racist asshole. You will never know. But why make YOURSELF feel bad by obsessing about his motivation, and assuming the worst? Tell yourself instead that the guy is a social misfit, and avoid him if you go to future events. Assume whatever makes you feel more positive, rather than thinking that someone dislikes you for some arbitrary reason