1. Watch his body language.

2. Eye contact!!!

3. Listen carefully to him when he's talking to you.

4. Watch how he feels about body contact.

5. Does he treat you different?

6. Does he act interested in things you like?

7. Does he look nervous around you?

8. Watch his friends!

9. Watch his actions. Does he copy your body language?

10. Does he gently tease you?