I have detatched (and still am OK with the sitch) and have not shown or reciprecated affection before and the relationship goes downhill...she states "I see that you are turning the page, so this is how it is going to be now, see, I told you you would end up resenting me." Then she stops talking altogether...
Michelle states to try somthing for a week or two and monitor the results...this did not seem to work.
You make the common newbie mistake of defining "work" by "she's being nice to me." Instead, you should do things that result in her making demonstrable moves away from OM and back towards your marriage.
Your wife knows that all she needs to do at the first sign of you standing up to her is say "see? you're being MEAN again!" and you'll come running back to her, demanding nothing from her.
My wife and I have been happily reconciled since 2008. I'll try to link to my old sitch later; you'll see what I did was VERY different to what you've been trying so far.