Perhaps you should have a physical. Believe it or not women can have what's called "low T." Just like men. We get older and the hormones become imbalanced. Speak to a doctor and testosterone for women. That will bring back you sex drive.
As we get older our bodies produce less of a hormone called testosterone. It's mostly in men but women have it too and it determines the sex drive. If you have no sex drive you may need a doctor to prescribe a testosterone cream made just for women, just for this purpose.
Or perhaps there is another reason but see a doctor to find out.