It really depends on exactly what is causing the unhappiness. Because it may not necessarily be the spouse. (Not that I'm defending crap spouses out there.) But it reminds me of something Clive Owen's character in 'Closer' said about his wife, that she wanted to be unhappy, because if she were happy, then she'd have to go places and do things that happy people do. And some people may very well want to be unhappy, and if that's so, divorce won't help them.
If it's a case of physical or emotional abuse or cheating or substance abuse, that's unhappiness coming from the spouse, so...you should probably transform and roll out. If it's just you don't like the way they fold their socks, I can't help you on that one. I can't really help you anyway, unless you need someplace to wipe your shoes. So it works out.
--sd-7