That's a very common fear for those of us in NC. That the WAS will have too much pride or be embarrassed to come back.
That's how I felt when W first left me. But she would send a meaningless text every now and then. And very slowly she started to come back around and drop little hints.
Here's the thing, if H really loves you, he won't be able to not reach out to you. It will be too painful for him. If he never reaches out, he wasn't worth your time anyway.
Time will tell. In the meantime, be the best Sparks you can be. Because I know for a fact, if you don't attract H back, you will find someone better. And you can take that to the BANK!