The girls I met on a blind date liked me and took the initiative to invite me to dinner, but after dinner they went home and never contacted me again. What is the reason?

There may be many reasons for this. Here are some possible explanations:

1. She may have other things or a busy schedule, which makes her have no time and energy to continue to associate with you.

She may not be satisfied with your character or behavior, or her interest in you is not as high as she expected.

She may think that you have no common topic or interest, or that you two are not suitable.

She may think that you are too impatient or too active, which makes her feel uncomfortable or stressed.

She may just want a friend, or know your personality and hobbies, but she has no plans for further development.

Whatever the reason, the best way is to respect her decision and not pursue or pester her too much. If you want to try to contact her again, you can send a short greeting or a friendly message first. If she doesn't reply or act cold, let go.