I was told that if a guy is shy, he would do something physical to show that he likes me. Can you give me some examples of things that he might go to show that he does in fact like me.

Most guys shy or not will keep checking you out. Have a friend watch him has you walk pass him if his eyes follows your every movement he is attracted to you. Also, when I was shy I could look someone I was attracted to in the eye I was look down as the girl walk passed me.