When a boy head nods and smiles?

Answer 1

Well, it depends on the smile. If he is walking by you, makes eye contact, nods and smiles, it could be a sign that he likes you. However, it is likely that he simply agrees with you in a positive way. Check for the eye contact, and the type of smile (wide, smirk, small, sad, etc.).

Answer 2

The boy is likely expressing agreement or acknowledgment through the head nod, and showing friendliness or positivity with the smile. This nonverbal communication can indicate understanding, agreement, or simply a friendly gesture.