Never horny?

I need some advice!? I'm never in the mood. I always see women posting on here about what their turn-ons are and what gets them really going, but I don't experience that...ever :( it takes a lot of effort for my husband to foreplay me into feeling in the mood and if he stopped trying I probably wouldn't even think about it for months..it's been like this for years so I know it's not my husband. Any suggestions? Hormone imbalance, or maybe I'm just doomed to be like this forever?....