On a date, understand that men don't listen to, touch, or look into the eyes of women they are not interested in. If he is engaged in conversation, preens, looks into your eyes occasionally, touches you on the arm (good) or on the small of your back (better) and is relaxed while doing it, then guess what? Ignore everything he says, and recognize that he's flirting with you (even if he says he's not).
Men tend to treat women they are friends with more like sisters than potential dates. If you're not sure where you stand, ask yourself if he treats you like his "girlfriend" from third grade. Sure, you may hug. He may be polite and chivalrous. If, however, he does not hesitate to look at other women, and adjusts his body language for them but not for you, then he's telling you that you're not date-worthy. He may love you as a friend, but he probably doesn't see you as a lover if he's willing to look for one in your company.