"I want my wife back!" you said.
What have happened that makes her leave? Was it some hole that you get yourself into? Those who sincerely want their wife back please do learn this word - "Humility".
Why? You better believe that you need to do some crawling and some begging if you are going to get her back.
Letting go of your pride now is a major thin The first thing you need to do is admit that you messed it up.
No excuses, no covering it up, just be a man an admit it.
Agree to her if she is telling you how bad is it, do not defend or even lie.
It will only get you into more trouble.
Also, do not try to gloss over saying it is not a big deal, you pay your marriage for it, and it is still not a big deal? The next thing, do not just talk, have some actions to prove that you are going to be better.
If there is something that you did that you should stop doing, then probably you need to take steps to stop it.
It may be tough, but it is a marriage we are talking here.
For those who are involved in drugs, alcohol, or even have problems with anger, get some classes to stop or change it before working on telling her you are trying to change.
Whatever problems it is that she says you have, just correct it.
This may be a lot of work, mostly hard work I should say, but efforts should be made if you really are shouting "I want my wife back!"