Is it normal to create a fantasy for every girl i know.

This has been a recent thing, but every time I "get to know" a woman, I end up making a fantasy about her. They aren't sexual fantasies and I don't just sit down in my comfortable lazy chair and think to myself, "Hey, I'll make a fantasy up for this girl." They sort of just, pop into my head. I actually began writing them down recently too, just to make sure I could remember some of the nicer ones.
To give you a sort of idea of what a fantasy would be like, perhaps a girl would come over and knock on my door (Even though she doesn't know where I live). For some reason she'd end up staying with my family because hers died or something and she had nowhere else to go. So I give her my bed and we live life in the convention of some sort of sitcom. Or on a rainy day I would see a woman trudging through wet terrain. A car approaches her, getting ready to spray a hefty amount of water her way. Just in the nick of time I would show up with an umbrella and deflect the water. Then when I look at the woman, I realize it's my fantasy girl. . .
Anyway, IIN?