How do shy guys flirt?

Also, If a shy guy is really awkward and tries not to make eye contact with a girl for too long (if they're right in front of each other) or gets sensitive around physical contact does that mean they dislike you or does it mean they DO like you? A shy guy I know does these things to me, but to me only. I'm not sure if he really hates me or if he's shy because he likes me.