After dinner with my blind date, he didn't contact me for three days. Is there no hope? But we have been chatting happily and don't know anything.

This situation is hard to say clearly, because there may be many reasons why he didn't contact you for three days. Here are some possible reasons:

1. He may not be very interested in you, or he has found other more suitable candidates.

2. At the dinner table, you may show some behaviors or attitudes that make him feel uncomfortable or not in line with his preferences, which may make him lose interest in you.

He may have other things to deal with, such as work or family affairs, which prevents him from contacting you immediately.

He may want to leave you some space and time so that you can contact him independently, which may indicate that he wants you to have more initiative and interest in him.

Finally, it may be because of some technical problems, for example, he may not have your contact information, or he tried to contact you but failed.

So I suggest that you can take the initiative to contact him, greet him and learn about his situation. Through communication, you can better understand his thoughts and attitudes, and then make more accurate judgments. At the same time, don't forget to keep a positive attitude. No matter what the result is, you should believe that you will meet someone who is more suitable for you.