I've always been curious but never had the time to look, but have there ever been any stories of a female human coming to Equestria and falling for whatever anthro stallion is there? I've seen plenty of normal ponies with human females, but never anthro.

A few. If you’re looking for something like that, I know one. Just search for a fic involving harems. Trust me, it’s there. Just look and go to the author to search his stories.

https://www.fimfiction.net/group/200540/fie try here

7597504
I looked there, but little none of them have anthro stallions hooking up with human women.