Need a new game plan

My partner and I have been together for a long time, and when we first got together the sex was HOT. Like 6 times in 24 hours hot. Recently though he’s just come to not want it, really. It’s normal for sex to fizzle at some point, but my sex drive is incredibly high. Everything else about the relationship is perfect, and we’re trying to compromise on the amount of sex we have, but the middle ground between no sex and any sex is difficult to find. How do I become more okay with not having as much sex as I am used to/would like?