I sent her an ambiguous message, and she didn't reply or refuse. What do you mean?

There are two possibilities: first, she deleted the message directly after reading it, ignoring your existence. Second, she is embarrassed to reply or see if you are joking (girls are generally shy and reserved). In view of the first case, you can give up. If it is the second case, you can continue to stick to it and success will not be far away. How to tell which situation it is, you can try to send it several times.