Training for a half marathon ... 12 weeks of getting out there on every planned "run day" and running... That is an achievement.
I think more so than running the actual event.
Anyone can run, stagger, hobble, walk their way round a half marathon.
But not anyone can complete a gruelling training schedule.
That's the real achievement.
Standing at that start line knowing you've done all you can is a far better feeling than standing there remembering all those times you didn't run.
Keep going. Keep going. Get this done.