I’m in the same not with my wife of 30 years.Sometime life get in the way. When we had our first child. My Husband work harder and longer hours. He started working 7 days a week 12-14 hour days. Sex was probably the last thing he thought of. A few years after our second child was born we try toys, lingerie, etc but after a long day he usually pass out or done in couple minutes.
Twenty years later and a few years ago he had a health issue and it made it worst. But at least he realize what he been missing/forgetting whatever you want to call it.