+1 for menopause=end of great sex.
Perhaps what you need is a life-threatening experience to shake you up and make you reassess your priorities. No amount of carpe diem advice can substitute escaping death by a hair's breadth.
I recommend you take up something really stupid and dangerous.
Think wing-walking; becoming a war correspondent; taunting rhinoceri; nude cactus-diving; blindfolded motorcycle jumping - you get the drift.
Or if those all seem too tame you could try crossdressing at a pro-Trump rally...
Look, I have difficulty expressing myself without being flippant. What I'm trying to say is are you really willing to trade your last x-years' worth of opportunities of being truly alive for the compromise of security and habit? Your wife sounds pretty much resigned to her gloomy existence and shows no signs of wanting to change. So leave her. Accept life in a small apartment (I'm assuming you're not a Rockefeller) and live out your dreams. Walk away, or possibly dance away, from your handcuffs.
Only you can kickstart your life - your wife is never, ever going to do it. Even if she accepts a few therapy sessions, she isn't going to change - she'll just keep insisting that's your job.