Seperation from alcoholic husband

I have kicked my husband out due to drinking, drugs, lies and manipulation. I still love him but this is second marriage and I have two teenage daugthers who see and feel the damage of this all. He has entered into rehab but do not believe he will put in the hard work. How do you get strengh to follow through with seperating and not living this life? I am committed to not being with him but feel myself wavering and still deep in the codependency that this has created. Help!