What I want is to be happy. That's what I want.....
What you NEED is to make your KIDS happy. I don't give a fig about the personal happiness of PARENTS until their kids are grown and out of the house.
Now some marriages may be so awful that the kids are actually happier with their parents divorced; but the large majority of people whose parents divorced when they were kids wre made LESS happy by the event. So - are you willing to trade their happiness for yours?
Wouldn't a better solution be figuring out how to change yourself in such a way that W naturally has to change for the better also? Then you could bpth recapture those feelings that brought you together in the first place?