Something missing

Sometimes I wish I could go back and relive the last fifteen years with the knowledge and the confidence that I have now. Perhaps I might actually have achieved more if I hadn't been so busy growing up. You would think that at 28, I might be feeling somewhat more like an adult - hell, I'm even sporting my first two grey hairs. Surely that should count for something.

But I always feel like there's something not quite there. That one day something's going to click and I'll finally realise that I've arrived.

Am I the only one who feels like this?