I can't think of anything better to rekindle the love than to put as little effort into something as possible.
Lose 40 lbs and take her dancing. Get completely ****faced and splurg the $17 netflix subscription on a cab ride home, then show her your locker room humor isn't just for the locker room in the back seat.
Rent a snowmobile and buy a nice bottle of wine. Take her to the middle of nowhere and break out the fake crystal. Throw down the bear skin rug and show her your locker room humor isn't just for the locker room.
Whatever you do, don't pretend acting like a 60 year old hermit is going to do the same for her that young buck MK11 did.