BRNR, Generally, a person begins the crisis approximately 18-24 months, or even longer, prior to the Bomb Drop (BD). That's why they can be so detached when they make the announcement and can appear to have moved on long before we do. Once you are detached and can look at things objectively, you can actually go reflect back on the time prior to the BD and can see where the person had begun to change.
The changes could be diet, music, paying off bills that they normally wouldn't do, cleaning out their closets, garages, sheds, etc. Why they could even purchase new vehicles in put them in their name only. They may refer to friends or co-workers who are having marriage issues. They become interested in people who are divorcing and they become interested in primping, exercising, jogging, things that they normally wouldn't have previously. They may even talk about separating/divorcing couples that you know, they become obsessed w/other people and talk about them all of the time. The OP may not even be aware that they are the topics of conversation. Things change gradually and that's why you don't notice the changes until the bomb drops and all h@ll breaks loose.
I tend to agree w/the 50%, but that doesn't mean it's half over because it will take as long as it takes for them to get through it and then you have to deal with the settling down at the end of the crisis which will take just as long as the leading up to it, if they opt to come home.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
