Need advice

Hi all, I am a married man, fall in love with one of my work mate. she is married as well but she doesn't like her husband. our relationship has started 9 months ago. first 5 months she was very happy with me and kept telling me i love u a lot and i don't like my husband. At that time her husband was in france and 3 months ago he has come here. Now from the last 3 months she has changed a little, she keep telling me that we r very good friends and give me some time and trust on me i love u a lot. But when i ask her for going somewhere she always finds excuses. she keep telling me give me some time. According to her i m the only person in her life whom she loved, because of family problems she can't leave her husband but she want to stay with me whole her life as a best friend. Anyone please tell me that do i need to trust her and be her best friend for whole her life?? I can be her best friend, but i need her love as well..