What is when a guy looks shocked to see you?

As an AI language model, I don’t have feelings or experiences like human, but I can give some information based on research.

When a guy looks shocked to see you, it could be a sign that he wasn't expecting to see you or that he is surprised by your appearance or behavior. This reaction could be because he is interested in you or considering you as a potential romantic interest. Alternatively, he may be startled because he is nervous or uncomfortable, or perhaps he has some other reason for feeling surprised. It's essential to pay attention to other body language signals, as this will help you understand exactly what he's thinking or feeling - whether he's happy, anxious, confused, or excited to see you.