She never accept our relation in front of anyone?

Hi i am in relation with a girl at my work place from last 1.5 years, initially we started as friend however we never disclosed our friendship in front of any one in office, we use to act as stranger, after six month of friendship we landed in relation but still we never opened this relation to anyone. Then i moved to different building initially i used to go to meet her everyday in her building she uses to like it later she started denying when ever i m willing to go to her building to see her. After one year of relation she still treat me as stranger in front of any one. Worst she never open her relation in front of any and one of her best friend is phone friend, she never met him but talk hrs and hrs daily and she is addicted to her friend and phone most of the time when she is with her friends on phone she never answers my phone call even. All she say is that she like me she never disclosed our relation even to this phone friend. She face hard time even to call me or answer my phone if someone is around but when we are alone she claims she is mine and she cant live with out me, she loves me. And this ignorance in front of her friends hurt me a lot.