Hi,
In my opinion, this pain in your left side between the 
hip bone and 
femur is related to coxarthrosis. This is a very common disease of the hip joint in women and consists of the rheumatic destruction of the joint.
 The risk of this disease increases with age, obesity, overusing the joint.
I suggest you 
consult a rheumatologist, for a physical examination, and X-ray examination to put the diagnosis.
Meanwhile, you should:
-take an anti-inflammatory drug, 
Naproxen once daily, for pain relief.
-exercise more
-try to lose weight, and eat a healthy diet
-and take 
hyaluronic acid supplements.
If lifestyle changes and treatment don't improve pain, you might also make corticosteroid injections.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr. Suela Gjata, General & Family Physician