Invite blind date to dinner. She sent me a message saying thank you for my meal.

If the blind date expresses her gratitude to you on WeChat, it may mean that she is grateful to you and hopes to maintain a good relationship with you. In this case, you can reply with a friendly message, such as:

"You're welcome. I hope you have a good time tonight. "

or

"I'm glad you enjoyed the dinner. I hope we can meet again. "

This will let the other party know that you have a good impression on her and are willing to continue to develop the relationship. But please be careful not to be too enthusiastic or eager for success, respect each other's feelings and wishes, and maintain a relaxed and natural way of communication.