What is what does it mean when a guy says hi to you first?

When a guy says "hi" to you first, it typically means that he is interested in getting to know you or is just being friendly. This could be a sign that he finds you attractive and wants to start a conversation with you, or it could simply be a polite gesture. Additionally, a guy may also say hi to you first if he knows you from a past encounter or is a friend of a friend. Ultimately, the meaning behind a guy saying hi to you first can vary based on the context of the situation and the individual guy's intentions.