You cannot really enjoy a relationship with a woman who does not want you in the first place. She might change her mind later, but it will not work anymore. When she feels your neediness, it will destroy her trust in you. Just get over it, and let it go. You can only fight for a woman who wants to be with you but is playing hard to get.
Determine whether the woman is playing hard to get or she does not want to be with you.
Speak with your best friends to find out what the problem is. If they all agree that the woman does not want to be with you, it’s over.
If you discover that she doesn't want you, stop pursuing her and deal with your pain by yourself.
You cannot enjoy a relationship with her, even if she changes her mind.