1. He babbles on when he talks to you.
2. There are long pauses between his comments.
3. He tries some how to relate, to you in many ways
4. He complements you at odds times, in various places.
5. If a guy, admits something slightly embarrassing or unknown to you willing.
6. If you catch him always smiling at you-Constantly
7. If makes fun of you in a harmless way, especially if he makes you laugh.
8. He wtches you as you walk by.
9. Gives you an uncommon way of contact him.
10. He digs for untypical information.
11. If he hangs around you a lot.
12. if he ever does flirty things, like smiling or winking.