Dear Pock,
Look to yourself to find patience, insight and understanding on this one. In our situation...addiction/codependency/relationship it is probably quite natural to "expect" an apology. Here are a few pointers from my E, S & H: expectations can lead to resentment; expecting an apology before the other person has really done some exploration around the need for said apology means that you might end up forcing a premature, shallow apology...and then the deeper work and understanding get band-aided with "your need" for an apology.
Also, pay heed and seek understanding on cynical one's post...as you continue to do YOUR work, you will discover that YOU have some apologies to make.
When one person in recovery asks another person in recovery about this sort of apology... it can be what is referred to as "taking someone else's inventory"...instead of cleaning up your own side of the street. It's easy to focus on HIS apology.
Also, look into the idea that your fear of his relapse may have hidden somewhere in it a fear of his successful recovery...maybe, just maybe.