Can't blame him really, he lives in Cheshire which is a lovely part of the country and Everton geographically makes so much more sense, he's settled with his girlfriend there.
Also they're a better team, he knows Martinez (who knows how to get the best out of him), and they'll probably offer more money lets be honest.
The big problem for us now is that a replacement is going to cost atleast £8m, which gives us less money to spend on other areas!!!