Welcome to my world!
All you can do is build your own life and find your own strength. If he does not come back, you will have built a new world, if he comes back, you will be a stronger, more empowered woman and less likely to be hurt by him again. Desperation is natural when the basis of your world has been shattered but it is unattractive and will not bring him back. Work on yourself FOR yourself - find and take care of the woman beneath the wife - the one who became the wife but don't be surprised if you conclude that he is not worthy of you