Al-anon was something I did for ME. When I considered telling my XABF that I was going, I had to examine my motivation. Why would I tell him? Was there some desired reaction I was hoping to get? Was I hoping he'd see what I was doing and realize "i'm serious this time", be worried/scared straight?
If I were someone accused of creating drama (justified or not), I would think a sure way to NOT be accused of it would be if you didn't announce your intentions, just went to your meetings and got as much healing out of them as you could.
Not to say you should lie if asked, but do think carefully about telling him and make sure you're doing this for YOU, and not to expect anything at all from HIM by announcing your intentions. Just my two cents! (((lost sue)))