Letting go of hope

I've been single for nearly a month now. There hasn't been any contact for a couple of weeks. I'm finding it very difficult to let go of hope even though I know that I have to. I've been using this time for self reflection to figure myself out and to become a better person. I have been seeing a therapist who is helping me through this, but how do I get past this feeling that she will reach out when I know that she won't?