Confused and frustrated!

I’ve been with my husband for 14 years, married for 8. We got together when I was 18. Of course when we met we had A-Mazing sex, alllll the time! Now, I’m never in the mood. It’s not that it’s not good or that he’s not attractive, but it’s just not there. I don’t know what to do. Plus I feel like we’ve already done everything, so I’m at a loss when it comes to “spicing it up” or trying something new. Please help!!