My opinion, Marle, is that she know how you feel. How her addiction affects everyone. Especially you.
I don't think it's enabling just to let her know, as swmnkdinthervr said, (that's a finger full. lol)that your there for her when she's ready but,
how you still feel about it. This may bring her closer. Or it may distance her. You know her better than I. So, it's your call. Just don't be afraid. Say what you need to say, even though your voice shakes.
We're behind ya 100%.
Your in my thoughts and prayers today.
Love ya,