I keep throwing her the same things because that's all I have.
No, you only throw the same thing because you are not going to other parts of the boat to find better things to try and help her with.
You might be afraid to move away from the rail incase she really does sink, but at the same time, you moving to find something better might actually give her the hope to hold on and to see if you can find something better. It will give you time to help yourself to help her.
Its the classic "put the mask on yourself so that you will be able to put the mask onto her"
Dive into relationship books, dive into IC/MC, seek out and attend marriage retreats, find out what her love language is and master it.
Sometimes the worst thing you can do is to continue to the same thing over and over again - its an action that says to a BS "hey, this is all i am going to do for you, so either take it or leave it".....a BS will leave it in a heart beat.
She knows everything though be it all wasn't from me. I've told her why I did it. I've told her I will never do it again. She wants new stuff.
How have you given this information to her?
Create a physical timeline, with extra space incase there really is something new that you can put down. make it 100 ft long if that is what will help your BS.
If that doesnt work, then try something else. And then if that other thing doesnt work, then try something else.
There are hundreds of ideas around here, all you have to do is ask.
The best type of fWS is the type that forward think and do need to be asked to do something....but also do the things that they are asked to do.