Is He Friendly or Interested?

A friendly guy will definitely make eye contact during conversation—it's only the polite thing to do, after all—but if he looks at you randomly from afar, he's interested. If you ever catch him trying to sneak a peek at a part of your body other than your eyes while you do talk, he's definitely interested.

How do you know if a guy is interested or just being friendly?

If a guy is just being friendly, he'll usually talk to you in a casual way. He'll ask about your day or what you're up to, but he won't get too personal. If a guy is interested in you, he'll want to know more about you. He'll ask about your hobbies, your family, and your dreams.

Is he flirting or is he friendly?

If he is flirting: A flirty guy will act more composed and cool when he wants to greet you. This is to allow you to feel comfortable with him, and if you are sensitive enough, you can tell from his gestures. If he is friendly: A friendly guy greets you the way he would greet everyone.