Just my 2 cents but before throwing away 25 years of marriage, shouldn't you try marriage counseling? I'm sure that there are many things that a good counselor could try to fix what's broken without blowing it up. While I understand the comment about the "feeling that time is running out", the feelings of regret that might result may never go away and tarnish the greener grass that you seek.

Here's an article that you might want to read: "Divorce Often Doesn't Make People Happier ... Sometimes Staying Together Does".

I think you should also work on getting your hands around what is making you feel that you aren't happy (or might not be happy). Your feelings might have little to do with your marriage. Just a thought.

Wesley Hein
Wesley [at] lifetwo [dot] com