Your efforts are worth it, but it could be 'what' efforts you are making that are contributing to the problem.
For exmaple. Let's say you are the one who takes care of the bills in your house. And let's say you've been trying to get her more involved and she just won't do it. Every effort you can imagine gets you nowhere, and you end up doing it because the bills have to be paid.
So one day, let's say you fall off a ladder and break both arms (God forbid). Now you physcially cannot do the bills. She has to help, for there is no other choice... other than have the bill collectors show up and cart all you own away.
I think the 'fixers' in the relationship can sometimes be their own worst enemies because they 'cave' before the other person has no other choice but to step up to the plate or lose it all.