Here's something interesting. No real conclusions, but thinking aloud.
For a long part of my marriage, I was too involves in church activities. The church was my mistress. I was passionate about building community, outreach, discipling others. There was my passion. It wasn't my job, per say. It wasn't my family.
This caused some strain in my marriage. I was burned out. So...I took a sabbatical from my duties as a lay leader. I stopped doing everything. I spent lots of time on at home. No more nights out, plenty of time to be with the kids, etc. I never really got juiced in my career.
So what happens? I slowly lost my nerve, and whatever passion I had slowly sapped away. I got excited about the possibility of helping start a new church and my wife was excited, too. But, somewhere, again, I lost my nerve and started to slip into a blue funk.
And then -- BOOM, she drops the bomb.
My lack of passion, my depression, my inability to get my s@#t together is part of the puzzle to this. My being a nice, hard-working provider didn't really get her juices flowing. I was spending a long time ina pity party kicking myself in the ass and she finally decided it was time to join in the party. And she did it with iron-toe boots.
People like to kick you when your down. Maybe it's evoltionary biology: kill off the weaker member of the tribe ;-)
Well, whatever it is, finding your call to adventure can only help.