I know how you feel.
I had to pull out last year with a stress fracture that appeared just 7 weeks before the big day. It was an awful experience, made worse by the irrational guilt I felt from all the charity money I'd raised but felt I hadn't 'earned'.
But guess what, the year since then has gone sooo fast. Before you know it you'll be subscribing for 10k's again, then applying for half mara's with a view to the big one.
Start thinking about next year's race now, that's what I did last year, set goals, and run every race with FLM 2009 in mind, and like I said, it will come around very quickly.
I has for me, next year is here now.
All the best.