Personally, I have learnt that once a girl tells you that it's over, don't waste your time trying to win her back. Simply ignore her and move on with your life.
You can like or love anybody you want but you can't just forced them to love you back you want to be with her it's good thing bit if she doesn't want it you can't force her and no means no if she said no then you should really stop courting her and try to move on .