Great post, firstymer. It shows a true understanding of what your wife might be feeling.
I told my (sort of) boyfriend who still drinks that I'm afraid I'm boring now. But he said it's just so nice that he doesn't have to worry about me anymore that it's ok that my behavior might not be as silly or fun. But I'm trying to be silly (make sh*t up, as he would say) and it's actually easier than I thought. So I'm learning to have fun without booze. Who knew. Making an effort to be spontaneous and fun seems like it would be counterproductive, but it's not. Eventually it will become second nature. Fake it 'til you make it.