It ALWAYS seems easier to stay where you are than to shake things up. It's also one of the reasons alcoholics have such a hard time quitting. Knowing there is something better out there if you change doesn't always overcome the aversion to the hard work involved in doing it.
I try to look at the long view. In five years, if I do nothing, things will be no better than they are now, and maybe even worse--not to mention that I will be five years older. If I change things, though, even though the process is unpleasant right now, in five years I won't have regrets about having wasted another five years of my life stuck.