Don't be offended that I am asking, and you of course don't have to answer, but are you still happy in your marriage? I have to wonder, because your post comes across as sad to me. Let me tell ya', I've been married to my husband for 17 years, and when he comes up and kisses me hard, French kisses me - I melt. I absolutely melt. We can sit on the couch and "neck" while the kids are gone, and by the time we're ready for bed, it's on like Donkey Kong.
My ex, though? I'd turn my head away when he tried to kiss me. Even before we'd realized there was a problem. That, to me, should have been the first red flag. Kissing is a form of intimacy, and when you are no longer intimate with your significant other, it just seems like a downhill slope.