Hi Jay,
No offence, please, but that is the normal case: Relations are finished and the love dissapears..... Your question indicates that you still love your ex-partner..... Better wake up from your dreanm and face the reality.... Your partner doesn't love you and those relations are (most probably) over..... so better concentrate on finding someone that deserves you...... or you can try to ignite your ex to love you again (happened more than once !)......
Best regards,