well even though im a tomboy i think i can give u a few pionters!!
1.if he looks at u in class alot
2.when he looks at u his face might turn red
3.**this one sometimes**when all the boys are huttaled up in a group and thin looks at u.
4.NOW THIS ALMOST NEVER HAPPENS when he starts talking to u he dosent look at u,he looks at the floor,AND he studders