Big problem is that it will be more convenient for us to move in together but I didn't want us to do that out of necessity but out of mutual agreement that our relationship has reached that level. But I understand the importance of living together in this case.
Have her move in with you and give you a small amount of rent.... less then what she is currently paying.
Then she still has some kind of partnership with you... also she can contribute to groceries.
She will end up paying less and have a bit more to spend every month. It will end up costing you less as well and you can help her out without it fully supporting her.
She will also still hold her own... but with the money she saves she can put some away to have a backup plan for if it all falls apart.
You can make it work if you are serious about each other.
My wife earns double what I earn, it did not start out like that. in 10 years we have never fought about money