Last of all, be positive, another hard one. You'll see the term "fake it till you make it". Any contact must be positive, no R (relationship) talk, PERIOD. Don't find reasons to contact your wife.

I see by your last comment that you are already using the term EX. That's not being positive, unless your divorced already and I missed something.

Your objective is to learn to be the man only a fool would leave.
Write down the issues you think helped contribute to the sitch, work on those, change them, become better. Not in a temp way to show you can do it win her back either, but real lifestyle changes that will be permanent. Get into some IC (individual counseling), if you can afford it, try to get some phone counseling here, number at top of every page. They will tailor a strat for YOU and your unique situation, trust me when I say its worth every penny. If you think saving your marriage is worth a few hundred dollars now, compared to a possible divorce later, you'll know what I mean.

Hopefully Cadet will be posting his welcome post with some fabulous links that you HAVE to read. Its time to get to work, its a long road ahead. You can do it my friend, so don't panic, just understand its a process, and we're here to help you thru it.