My 20s was a sea of worry. I worried about benefit forms, about being thrown out of my flat. I never went on holiday because I thought: 'What if an audition comes up?' I was a nervous wreck.
Once you decide not to worry about that stuff anymore, dating and relationships and love and all that, it's like you're free to get on with real life.
All young people worry about things, it's a natural and inevitable part of growing up, and at the age of sixteen my greatest anxiety in life was that I'd never again achieve anything as good, or pure, or noble, or true, as my O-level results.
I worry sometimes that I'm a bit moralistic; always writing about men who are learning to grow up, not be so self-absorbed, selfish or badly behaved. I wonder if that's dull and liberal and wimpy? I should probably write something that celebrates wickedness.
As a novelist, I'm incredibly lucky to make a living, but that doesn't mean that I don't lie awake at four o'clock in the morning, worrying.
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