The other option (besides divorce) is to get back to those original feelings of love. Feelings do change over time, but we have strong influence over the way we feel. What we tell ourselves, what we believe and what we think all have a very powerful influence over how we feel.
(For example, at a football game, the red team scores. Half the people in the stadium cheer, while half the people boo. Same event happened, so why the different reactions? Both sets of people had different beliefs about the same event - half of them believed it was good and half of them believed it was bad. So our beliefs about the things that happen in our life affect the way we feel about those events.)
I think it's sad (and maybe a little silly) to just stay unhappily in a relationship - especially with kids involved. (I doubt they'd want to teach their kids that miserable marriages are normal or desirable.)
My first gut reaction would be counseling. I wonder why he doesn't want to do that? Marriages (generally speaking) are worth working on. No relationship is easy, and no partner always feels madly in love with their other half. But generally it's worth hanging in there and working on it, because if both people work hard it CAN get happy & healthy again.