Sexual disorders among women usually have a combination of causes, including physical and mental. Consequently, to treat them, you need to investigate the reasons. 

Possible methods of increasing your libido

• Improve your lifestyle. Quality of life, including poor health status, affects sexual drive among women. 
• Get counseling. Depression, dissatisfaction with your partner, problems in your relationship,  certain medications, and a history of physical abuse are among the most common causes of a lower libido.
• Practice yoga. According to the The Journal of Sexual Medicine, a study has shown that sexual function scores were significantly improved among women who practiced yoga. 

After a thorough examination and a variety of tests your doctor might prescribe you a hormonal therapy, which might include testosterone supplements. Although not approved by the FDA (The Food and Drug Administration), testosterone has featured in substantial studies that support its efficacy in women (e.g. a research published in the Journal of Medicine, New England).  

Sources:

Low sex drive in women, mayoclinic.org

Yoga in Female Sexual Functions, sciencedirect.com

Testosterone for Low Libido in Postmenopausal Women Not Taking Estrogen, nejm.org