I am sorry for your pain. I know this has got to be wearing on your patience.
I have some suggested actions for you.
First off, go buy a nice fitted suit. Spend the money for a nice one.
Find a dance club in your area. Sign up for lessons. Show up for dances by yourself if you have to. There will be some single women looking for a dance partner.
On the day of the first lesson, tell your wife that you have signed up. Don't give her any more notice than 24 hours. Ask her if she would like to come along. If she declines, then you go anyway.
Your wife has told you that other women wouldn't be interested in you. Let me tell you something; working, capable, and sexual men at your age are in high demand. If she doesn't know this, it is time to educate her by example.
I suspect, that just as she knows that the oral claim was bogus, she knows that you are an attractive man to a lot of women.
Get out from under her. Stop chasing her. Grab your hat and suit, go out and just have a look for yourself at how many single women your age and younger are interested. Make some new friends. Socialize. Go to the gym.
Let your wife chase you for a while.
All the best, -NOPkins-
I will ferret out an affair at any opportunity.
-An affair is the embodiment of entitlement, fueled by resentment and lack of respect. -An infidel will remain unreachable so long as their sense of entitlement exceeds their ability to reason.