You seem to have feelings for him. If that is the case, you need to be honest with yourself. Hard to say what that 'love' talk was. I won't speculate. And I have to tenderly disagree with Barb. Some men are direct and know what they want, others are clueless and inept at stuff like that. But your friend is neither. He is an addict. You can't give much weight about what he says or does at this point. Since you have been friends for a while, he may love you but sounds like it wasn't so much romantic as a friendship type love.
Also, the wife thing is problematic. Yes for the obvious reasons but it is going to be exponentially worse because he is an addict. I'm stressed just typing about it. Don't put yourself through that. You are just multiplying the problem for yourself. Be his friend. but don't overanalyze what he says or does right now. He is still married and still an addict.