Hi, Single Mum. Welcome to SR.
You have done the right thing. Keep on doing it.
I can tell you that your SO is in no way ready to become sober.
You would know it if he had.
Recovery looks like recovery.
I think it is doubly hard when we walk away from the addict in our lives. We miss the person he/she was (or what we believed he/she was), and we also give up the idea of the life we hoped to have with this person.
It is sad and disheartening, but you are wise to stay away. Until and unless your SO embraces sobriety, he can't be the partner you want and need.