It’s not her pushing you away it’s the addiction. It’s so hard for you though. She doesn’t want to face up to it yet, but that day can come at any time. Somehow we have to stay sane and have lives of our own in the meantime. It’s so hard I know. All you can do is be there when she’s ready, and try not to be manipulated by what is driving her. You will get through it.
There is a really good thread on here of a group of mums supporting each other. It’s the Theresa thread, with zillions of pages of messages about our children. You’ll be very welcome there and will find a lot of support.