It does help to know about body language. If a guy is into you his eyes dilate when they see you but he'll only continue to like you if he senses you like him back. Then you are a mirror of him and two people feel they are the same inside. Then he'll ask you to be his girlfriend, then steady girlfriend, when he is ready he'll get down on one knee and ask you to be his bride. If he has many memories of you and him out and and is sentimental he will love you even when you are old and gray if you and he are of one heart. There will be temptations of other beautiful women and temptations of other handsome men but couples that face the difficulties of life together aren't just each others lovers but each others heroes. Loyalty is better than starting from scratch with a new lover getting to know each other again.. that's why it's better to go steady.