I just met him - how do I know he's interested in me? *10 pts best answer!*?

It's all about the body language, and the conversation. If he talks to you and looks you in the eyes when he's listening, that's a good start. When he talks, if he tends to touch you lightly, also a good sign. If you two ever have conversations about yourselves, does he talk more about himself, or does he ask questions about you? There are so many things, yahoo has articles about this stuff in their dating section