I've been married for over 30 years and that's just BS. There are still infinite layers to peel, more vulnerability to plumb, more sharing to do, more intimacy to experience. Most women's libido tanks because they are bored. Keep phoning it in and telling oneself that it's her fault she's not responsive to relationship laziness and nobody wins. Make an effort, and everyone does.

https://www.theatlantic.com/ideas/archive/2019/02/women-get-bored-sex-long-term-relationships/582736/