You get such a biased view into other people's lives (because people post happy things way more often than they discuss their real problems on their profiles/pictures) that it's easy to get overwhelmed with the greener-grass feeling.

Now I'm not saying it's a reason people get divorces (I won't believe that until I see some stats) but I do believe it has the power to amplify an already existing feeling of displease at your couple or significant other.

You know what was the great divorce creator before Facebook? Telephones! And before that? Pen & Paper! We should go back to cave living.

I'm surprised this off-topic rubbish heap of words made it to the front page on HN.