What is when a guy says i miss your face?

When a guy says "I miss your face", it generally means that he is missing the person's physical presence. It could mean that he misses looking into their eyes, the expressions they make or the way they smile. It's also a way of expressing that he misses them as a whole person, not just their voice or personality over the phone or text messages. It could be a sign that he has romantic feelings towards the person or a strong connection with them.