A man told me that talking to me requires thinking, and he was afraid of saying the wrong thing.

This man may be expressing his respect and attention to you, because he thinks you are a smart and thoughtful person, and he needs to think carefully about what he wants to say so as not to say the wrong thing or offend you. However, this expression may make you feel stressed or uncomfortable. You can communicate with him and tell him that you want to communicate more easily, instead of making him too stiff and nervous. At the same time, you can also relax yourself as much as possible in the usual communication, so that the other party can feel your confidence and affinity, which can also make the communication between each other more natural and happy.