I think you have been given the answer here but your not hearing it.

You can't do anything!
You can't fix her.
Nothing you do will change her behaviour.

So now you look at what YOU want with that in mind.
As things are, you are looking at another 5 years of this.
Can you do it, just letting it go, and doing the best you can without judging or getting angry.

If this life as it is, isn't what you want then you have to make another choice. A choice for yourself. Because you are the only person you have control over.