I know how you feel. I have a very close friend that was addicted to nose spray as well. It was the one that starts with an "A". Can't think of it right off hand. He did get himself off, but it took a while and he also had to go through a spell where his nose was stopped up. He had to 'retrain' his nose to clear on it's own and not be addicted to needing the spray in order to clear his nasal passages.
One thing that you may want to try is "Ocean". This is a nasal spray that is simply saline. This is all natural, no chemicals. This may get you to the point where you are able to get good breaths on your own as well as safely using a spray (that will address the desire to use something to alleviate the trouble.) This, however, does not help with the actual resolve of using a spray. That is something you will need to address with your doctor. I know it sounds simple, but it IS something that you are clearly wanting to address, and I am glad that you want to do this. It shows you are serious about your health.
Speak with your doctor and see if he has suggestions of overcoming the habit of feeling you need to use spray to breath. Then you will be able to use the spray only when you REALLY need it.
Hope this helps,