BlueCreek

Well, I don't know that there is very much to say in the end. I think you do believe you've tried everything and you've already decided it's over and you're finished. I'm not intending to sound condescending, I assure you. I merely mean that you have stated your intentions unequivocally and with no wiggle room. You're not here for advice on how to improve your marriage or what you might do to resurrect what you once felt for your husband (though I would disagree with you on this one point, there are ways to fall in love with a spouse again, no matter how much has been lost. It takes effort, commitment, and imagination, but it is always possible.)

But, again, that is not why you are here. So, strictly answering your question of what you can do about your husband. Nothing.

Seriously, you and he are in two completely different emotional places. You basically want nothing more to do with him, and he would give anything to keep you together. In the same way there is nothing your husband can do to change how you feel, there is nothing you can do to change how he feels. Nothing you can say or do will make leaving your husband any easier on him or make the pain of being in love for decades with someone who does not reciprocate any easier.