I haven't found much solace in religion, although I've looked.  But I have found a bit of comfort in quantum physics, of all places.  Under some variants of the many-worlds theory, there's a whole set of worlds where you and I are still together, and your cancer never returned, or returned in a fully treatable form.  So, even though I can't be with you, somewhere and "somewhen" else there's a version of me and a version of you living out the rest of our days in blissful harmony.  I just wish it was this universe.