Did i do the wrong thing?

My crush and I have always flirted in cl. One day, she saw me talking to some chic and got jealous. I managed to get the courage to ask for her number and she turned me down really harshly. Then I saw her look at me with a "sorry look on her face", and she just stood there are stared at me. Was I wrong for walking away, or should've came over and talked to her?