My wife has almost no drive anymore, i dk what to do or say.?

i have literally tried everything from messages to cleaning everything for her taking care of kids for her, not even trying so as to not pester her too much, romantic dinners, and plenty more and each time i would go for about 2 or 3 months before trying something else, even all them combined. im lost on what to do we only have or anything related to once every couple months or so. i have already talked to her about it and all she says is she will try harder but that was over a year ago when she first said it. and have tried a couple times since then. any advice is welcome.....ty.