1 Chat with each other frequently on WeChat or SMS. When a person has a good impression on another person, he may want to know more about the other person, which may be manifested in frequent chatting. Chatting content may involve some trivial matters, even meaningless to some extent, but it is a process of gradually establishing trust and intimacy between two people.

2 physical contact with each other. This physical contact may be unconscious, such as touching an arm, shoulder or knee lightly. When two people have an affair, they may unconsciously seek physical contact. This behavior can deepen their emotional connection and make them feel warm and safe.

Always praise and compliment each other. When a person likes another person, they may often express their appreciation and praise for each other. This kind of performance may include praising each other's appearance, wisdom and talent. This kind of praise can make the relationship between two people closer and enhance self-esteem.

4 often initiate dating. When one person has a good impression on another person, they may often invite the other person out, such as eating, watching movies or participating in other activities. This kind of behavior can give them more opportunities to be together, increase interaction and understanding, and thus deepen their feelings. At the same time, these appointments may be vague to some extent, keeping the two sides at a certain distance.

5 Interact on social media. When a person has a good impression on another person, they may pay attention to each other's dynamics and actively interact on social media. This interaction may include liking, commenting or sharing each other's content. Such behavior can express concern and interest and make the other person feel concerned and recognized.

6. Be good at reading words and feelings. In an ambiguous relationship, both parties may observe each other's emotions and needs more sensitively. They may provide support, comfort or encouragement to meet each other's needs. This kind of behavior can enhance mutual trust and make them feel that there is a trustworthy partner around each other.

7 Carefully care about each other's life trivia. When a person has a good impression on another person, they may pay more attention to the details of the other person's life, such as asking about the other person's daily life, health or work. This kind of care reflects the importance of each other in their own hearts, and at the same time, it can also make both sides feel warm and caring in the process of caring for each other.

Give special attention and care. In an ambiguous relationship, one party may provide special attention and care to the other party, such as taking care of the other party when he is sick or providing support when the other party needs help. This kind of behavior shows a concern that transcends the relationship between ordinary friends and can deepen the emotional bond between the two sides.

9 Private intimate terms. When two people become close, they may give each other an intimate nickname in private. This nickname may be unique and only used between them. Such appellation can enhance their intimacy and express their special emotional connection.