You will need
  • Interest
  • Observation
  • Elementary knowledge from the field of psychology
Instruction
1
Pay attention to his body language.
When a man is interested in a woman, he tries to be as close as possible to it. During a conversation turns to the companion of his whole body, leans in her direction, catching her gaze. Being on the other end of the room, it will still from time to time to try to make eye contact with you.
Catch his glance for yourself and pay close attention to the pupils. If they dilate at the sight of you, he definitely feels attracted to. Keep in mind that your eyes, if you like what you see, with the same readiness will give you to him.
2
Watch his behavior.
Seeing an attractive woman for him, the man starts to behave as a peacock. He straightens her hair, tie, cufflinks, zipper pulls on the jacket and otherwise preening. If a woman far away from him, he unwittingly begins to raise his voice in conversation to attract her attention. Gradually it will move around the room to be closer to that which it entails. This behavior is almost impossible to take control because it is inherent in us by nature. Because it we are just males and females, following the instincts.
3
Compare his behavior.
Pay attention to how he behaves with other girls. If it is equally uninhibited with everyone all trying to put his arm around her, laughing, before each "fluttering her tail," this is a bad sign. But if he is all relaxed and natural, and you are timid and shy, it is an indicator that you are more important to him than others.
4
Analyze what he is talking to you.
If he asks more of you than talking about himself, he's definitely in love. It is only the object of passion may be of interest to more than himself. If he in interested in your interests then you definitely cause him concern. If he teases you a little, he wants guaranteed to capture all your attention.
5
Take a look and listen to others.
Usually someone from the our love more visible than the one in whom we love. If his friends tease him when you're around, they either know, or notice something you miss.