The Telegraph has a piece on what they call The Toxic Wife. She married for money, and now that hubby no longer has any (because of the Global Economic Meltdown), she has no reason to pretend to love him or stick around.
An article in the City Journal (fast becoming one of my favorite reading destinations) focuses on Love in the Time of Darwinism aka the Post-Feminist dating scene. I don't agree with everything in it, but it's a good read.
Both of these articles focus on the female half of the population. I haven't read a lot of articles on this topic that focus on men, but I am working on an essay on the subject and will post it soon.