http://articles.latimes.com/2013/mar...deast-20130323
The break up started all the way back in 2010. After Israel killed 9 Turkish activists the US was put in the uncomfortable position between the 2 countries. Obama had promised to recognize the Armenian Genocide, but he never did. He convinced the Israeli prime minister to apologize for the 2010 incident. It almost looked like the US could make it's 2 biggest allies in the middle east kiss and make up, but then came the anti-governmental protests.
All of Europe was watching how the turkish regime crushed the protesters with excessive force. Many European figures condoned the behavior and the US was forced to pull away from Turkey. The next big blow was the failure of Obama to start a war in Syria. Turkey had been the training area and the place from where most jihadist entered Syria. Turkey had invested a lot in toppling Syria and expanding it's influence south. A weaker Syrian government would have made it easier for them to deal with the Kurds there. The incredible amount of refugees likely also play a role since they can't go back home until the war is over and are now stuck in Turkey.
http://www.hurriyetdailynews.com/tur...&NewsCatID=359
So just a month ago Erdogan asked Putin if he can "take him to shanghai" which shows that at least the ruling regime has given up on the west and is looking for alternatives. Regardless, most of the growth in Turkey at the moment is caused by a property bubble and the unstable government could give in any day.
It's highly likely that the current premier has lost the favor of the US government which means that they will likely support a regime change in the near future.