Its great to hear the change in your mood. In future - when things get difficult again as they often do (that's life) - back away and remember the last couple of days and what made the difference i.e. you changed your mindset. > your mood > your actions > her reactions: these all changed as well. Just remember - your mind is the engine of your whole life - your thoughts are its fuel, and your willpower the ignition key (or something like it anyway). So don't clog up your engine with crappy fuel.
That doesn't mean you can by the power of thought alone "change" your wife into a sexual diva, but as DQ says, the vibe you bring to the marriage is a great incentive for her to really get in touch with herself.
Plus, the manning-up thing is primarily for you. You might want to see how your new approach with your wife helps you in other areas of your life.
S&A
"A man can be destroyed but not defeated" - from The Old Man and the Sea, by Ernest Hemingway.
Which I take to mean that every man has within him a spirit of relentlessness and optimism. Its already there; he just has to cultivate it.