google "dry drunk syndrome' or "relapse syndrome". it sounds like he is heading for a slip or a complete relapse. and you are likely looking for support because your intuition tells you this. if he does not become rigorously involved in a support group,
the probability is very high you will soon be living with an active drug addict. you will be best prepared if you educate yourself about addicts in the relapse syndrome and if you educate yourself about what happens to those who live with active addicts. you are in the right place. keep reading and preparing, if you want to stay with him through whatever is to come. your own emotional and physical safety will depend on it. he will abuse you if he is not in recovery. that is what addicts do.
sending love to you.