There is some material about daydreams and the imagination in Stella Gibbons's My American that reminds me of points I have made in various articles in the past, articles written long before I had read this novel. The contexts and the people may be very different but the principles are the same.
The young writer Amy Lee in My American spends much of her time in a trance-like state; her life is one long waking dream. What Stella Gibbons tells us about Amy's imagination and the imaginary people she dreams about provides independent confirmation of and adds to material in articles such as the ones about Stella Benson's imagination and Stella Benson's imaginary friends.
Stella Gibbons's words provide further support for the proposition that a strong, vivid imagination can be a two-edged sword, a handicap or even a curse that ruins lives and destroys its possessor. She mentions the dangers of having a super-developed imagination: it can cause mild delusions; it can create a mist that shuts the owner away from the world; it can prevent the owner from growing up, getting on well with people and acting effectively in the real world. The article about Terry Pratchett's sinister Fairyland is relevant here.
Amy Lee's imaginary companions
Stella Gibbons says this about Amy's attitude towards the characters she created for her stories:
“Day by day she cared less for people and more for imaginary pictures so strong that they were more like feelings or dreams than ideas inside her head. She felt only a passive affection for the Beedings. Indeed, she did not feel active affection for anyone living; she only loved the memory of her mother, while for the dream-people in her mind she felt such a strong interest and concern that it could have been described as love.”
This is exactly how some people feel about fictional and imaginary characters who are much more glamorous and interesting and do more exciting things than the real people in the dreamers' and readers' lives.