Sorry to hear that he does not want to deal with the CSA. Its really sad though. In AA we have a saying, you will know a new freedom, its actually one of the promises, and this is so true for those of us that have chosen to deal with our CSA, we heal and we find a new freedom, free from doubt, self loathing, fear, and insecurities. Sorry that he does not want that for himself yet.
Its sad to say, but yes, focus on yourself, your career, put yourself first, go out with friends, treat yourself to a Spa treatment, a weekend away. LIVE, HAVE FUN.
You will see that at least your life will improve, perhaps he will get lonely and if he wants to join you, well then you have those lovely terms and those lovely boundaries in place, that many of us hate, that he must adhere to
You only have one life, live it.