Hi Numb
Some couples do come through the separation and make a success of their marriages again - there are some threads here (though I'd have to do a bit of digging to find them), and certainly we know some couples personally.
One frequently overlooked aspect to this is to look to try to create a managed separation - there is an article
here which describes what I mean. Basically it involves setting the ground rules for both of you to behave to during the separation, and trying to decide what the criteria are for either ending by parting, or getting back together. If you can get a third party to hold both of you accountable in the process, then so much the better.
Best wishes
Dave