Article in English: His body language can reveal how he feels about you. Here are some things to consider: The subject of your conversation may indicate how he views you. Several signs to watch out for are:   Teasing. Playful teasing may hint that he wishes for you to tease back. If you're brave enough, add subtle flirting to spice up the mood.  Personal Information. Talking about his problems shows that he trusts you. Deeper subjects, such as his fears or family issues, may mean that he wants to take your relationship with him to a deeper level.  Compliments. Comments on your intelligence, appearance, etc. may be a sign that he admires who you are. If he seems to be complimenting you more than often, he might be interested in you.  His Manners. He may soften the edges of his rough personality when he is around you. For example, he might have vulgar behavior around his friends, but he makes an effort to be more refined with you. This is a sign that he is paying attention to you and what you say.  Discussions About Past Relationships. Your conversations with him may take a dip into your past relationships. This indicates that he is making a subtle attempt to see if you're single or interested in other boys. If he makes constant attempts to set you up with another boy, he may be keeping you in the friend zone. It can tell you if he just wants your dating advice or if you're the girl he is after. Constant requests for advice indicate that he may be only interested in your opinion since you're a girl. However, he may also be asking for tips so that he can collect information on your dream guy. Keep an eye on his past relationships. Short, frequent ones may indicate that he is either a true player or he is attempting to make you jealous. Some shy boys make their feelings clearer online or over the phone. Identify the ways he communicates with you, using the following methods:   Phone Calls. His voice will reveal how he feels. A nervous tone, stuttering, and hesitancy may hint that he has feelings for you. Long conversations also push...

Summary in Vietnamese:
Quan sát cách cậu ấy nói chuyện với bạn. Theo dõi các đề tài cậu ấy lựa chọn. Nghe những nhận xét của cậu ấy về các cô gái khác. Chú ý cách cậu ấy cư xử khi hai người ở xa nhau.