A little less running

I know it's time for a break.  I've made a promise to myself that I won't sign up for any race longer than 13.1 miles until January 1.  I know in my heart that this is what I need to do.  I know that my muscles, my body, need time away from the constant distance.  

But there is a part of me that is terrified of all the time that I will have.  Without a big running goal, will I stay motivated?  Will I have a purpose?  Right now I'm feel purposeless and I can't say I like it.  My running has defined so much of what I do and so much of who I am these last couple of years, that I already feel a vacancy.  I won't stop running.  3-4 times a week is still in my cards, but what will I be running for, other than just to run?  And is that enough of a reason to run?