Decision to Leave

I listened to the most recent podcast on leaving. the concept of finding happiness from within and not your surroundings I agree with; but how does one find complete happiness in an abusive relationship with an alcoholic when the environment is completely chaotic?

Alcoholics, if not sober aren’t very good participants in communication or work; so to leave the marriage with love,  I would have to completely work on my own perspective. and I will not rush. My thought/belief is that I am the happiest I can be given the circumstances but I do think leaving would give me more peace.

How does one approach leaving an active abusive addict?