You have to decide what is extraneous and what is central. There is always more to tell. If you want to have a finished product, at some point you have to say "enough."
Aren't I enough for you?' she asked. 'No,' he said. 'You are enough for me, as far as a woman is concerned. You are all women to me. But I wanted a man friend, as eternal as you and I are eternal.' (Women in Love)