Could you give me a sense of how different your & your H's libido were? For example, he'd like to do it every night and you're more like once a month?
Also, maybe your drive is very much attached subconsciously to your H's behavior. Is he a good partner in other ways? Does it do his fair share of housework and child-rearing?
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final