Keeping It Even Closer: A vital aspect of the physical nature of romance is reciprocity. Translation: meeting his advances with your own. This not only signals your own interest, but also serves to keep his.
The Eyes Have It: We've all heard the proverb, "The eyes are the window to the soul." If he's interested in you, he'll focus on you with those piercing peepers and hold it. Return his romantic gaze with a quiet smile and let him know that you are interested. He'll be at your side in no time.
Touching Is a Good Thing: If a guy is interested in you, then he'll want to be near you. He'll also want to take every opportunity to touch you. Maybe it's your arm, your leg, your knee - it doesn't matter, as long as his presence is physical and affectionate. It's his way of letting you know he likes you.
Funny Meeting You Here: Coincidence is out. Serendipity is in. Those so-called "happy accidents" may not be so accidental after all. Perhaps his "surprise" appearance at your favorite Starbucks or hangout is a signal that he's trying to connect with you (but doesn't want you to think he's a stalker!). Take this as a positive sign and make the most of your next encounter. You may find that you share more in common than just an addiction to double lattes.
Listen Closely: How do you know that you have a guy's attention? When he's not talking about himself. It's that simple. The next time you're in a bar, listen closely to any table full of men and you will hear them speaking rapturously about their favorite subject: themselves. For a man to shut up and really listen to what you have to say, you know it must be love (or at least a strong attraction). He'll put that male genetic ADD to rest once and for all after he's found his Miss Right.
The Guy Who Liked Chick Flicks: Okay, we all know he'd much rather be watching the big game, but it's an important sign if he shows an interest in the things you like as well. If he's happy to watch a movie you picked out or doesn't complain when it's time to hit the mall for a little shopping trip, you've made a serious leap forward in the dating game! Give him extra points if he makes the popcorn.
Funny Lady: Can't tell a joke to save your life? Does he laugh at it anyway? Men are very in touch with their sense of humor (women often complain that men never take anything seriously, right?), so if he's sending some hearty laughter your way, it's a good bet he's looking at you as relationship material.
Confidence, Man: If a guy's into you, you make him nervous. He'll get goose bumps or a rapidly beating heart just from being around you. Look for signs like unexplained laughter, sweaty palms and fidgeting. Guys always want to be in control of their emotions - we like to be in charge. If he has trouble doing that around you, it's most likely because you make him nervous and excited. Don't take it for granted; help him to relax, and he'll thank you by being a great guy you can depend on.
The Feeling Is Mutual: Men and women have very different brain chemistries: She is verbal; he is not. He is driven by visual desires, while she is guided by her deep emotions. Women are taught to rationally express their feelings and feel no shame in crying, and men punch things. Therefore, if you get a guy to actually open up and express his emotions, consider it a major achievement in your relationship. Discussing your feelings for each other is a powerful bonding experience for the two of you and serves to strengthen a relationship for whatever challenges the future may bring.