1. Stay calm and observe the situation: Do not immediately overreact or frequently ask for reasons, as this may make him feel stressed. Observe whether he exhibits the same indifferent attitude towards other things or people to determine if it is a personal issue or a response in a specific situation.
2. Self reflection and maintaining self-worth: Reflect on whether there were any inappropriate behaviors or words during the ambiguous period that made him feel uncomfortable. Regardless of the outcome, maintain your confidence and independence, and do not doubt your own value because of his attitude.
3. Timely communication and expression of feelings: When your emotions are stable and you observe sustained coldness, you can choose an appropriate time to express your feelings and doubts in a calm tone. For example, "I have noticed that our communication has decreased recently, and I am a little worried that there may be something I haven't done well enough, or do you have any ideas you want to share with me?" Give him space and time to respond, respect his choices and decisions.