Being sober for 10 years is an amazing achievement and shows such strength of purpose, so well done on that!
However reading your post I just cant understand why you are with this guy, he has really serious issues with addiction that are not going to go away easily. If he is serious about a relationship he will need to decide for himself that he needs to clean up, you will not be able to persuade him to do it. Be careful about wasting too much time on him, or trusting him, for as we all know, addicts can be very untrustworthy.