It sounds like you are thinking really clearly about all this and I commend you for that. Great that you are attending Al-Anon as well.
Willingness to abstain from drinking is easy to say, very hard to do, as you have already seen. You both agree his drinking is a problem, yet he continues.
Mentioned here a lot is the saying - "Action not words". Words are easy, actions, not so much and those are what will show you the truth.
Perhaps this will help you gauge that:
https://www.soberrecovery.com/forums...full-crap.html (10 Ways to Tell When an Addict or Alcoholic is Full of Crap)