My Running Currently in Holding Pattern

My running right now seems to be in a holding pattern, with me maintaining an average of three to four miles a day.  I don't feel as if I am getting better with this, but then again I'm not backsliding either...at least I hope I'm not.  I was planning to run a half-marathon on November 16, anticipating some substantially cooler weather by then.  But even if the weather was that cool right now, I seriously doubt my ability to finish the race, much less run well in it.  So I might be waiting until January next year to run a half-marathon...presuming I get my motivation back.  I also think that I could probably do better with my eating, probably consuming too much food in the past few weeks...