I saw the wrong person on the street and contacted her to ask if it was her. She said don't miss me too much, what does that mean?

Maybe she knows you are interested in her and thinks you admit your mistake because you miss her too much. And she has a joking tone, look at your performance. She may not call you for the time being, but that doesn't mean she is resisting you. You can contact her slowly and let her get to know you, so that you have a chance to catch up with her.