It's a story about people watching.
the character sees this woman and develops a story in his head about who she is through day dreaming. and he does so to the extent that he actually sort of falls for this character. then he is confronted with the reality that the person he created was just an illusion. So he has to face the realization that Alison is not Lily. Lily doesn't exist in the real world. Lily is only in his imagination.
You aren't the only one who doesn't like it. Out of all the people I've showed this to, only one person has said that they enjoyed it. Oh well. I wrote it because I experienced this event myself and I thought it would make an interesting short story. I quite like it, myself.
I can't respond to your comments without seeming condescending myself.
I don't understand how you can't grasp it. It seems like a perfectly normal human activity for one to make more of what is there by utilization of the imagination. It's seems perfectly human to me for one to fall in love with what is not there. To want what one cannot have.