Your reasons for giving it up are thought out and valid. I'm kind of in the same boat as you except my GF knows and does not want me to CD. It's been ten agonizing months since I purged. The thing is I had only been seriously CDing for about a year and it's still very difficult for me not to repurchase stuff. To be honest I regret the purge! I have stuff in my ebay shopping cart right now. I have just not hit the purchase button. At least for me I am coming to the realization I could at any time start again.
You may well be able to stop, but for me it's really frustrating. I was happier when I CDed than I am now. I love my GF, but there is always a moodiness about me that was not there before I quit. Only time will tell, and I wish you luck.